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CompletedNCT05035095OASIS 1Updated May 7, 2026Results posted

Research Study to Investigate How Well Semaglutide Tablets Taken Once Daily Work in People Who Are Overweight or Living With Obesity (OASIS 1)

A Phase 3 interventional study of Oral semaglutide and Placebo (semaglutide) in Obesity and Overweight, sponsored by Novo Nordisk A/S. Completed at 56 sites in 9 countries. Open to participants aged 18 Years and older. Per ClinicalTrials.gov, last updated 2026-05-07.

Sponsored by Novo Nordisk A/S · Phase 3, Interventional, and Treatment

Phase
Phase 3
Study type
Interventional
Enrollment
667
Allocation
Randomized
Ages
18 Years and older
Sex
All
01

Study summary

This study is being conducted to see if semaglutide tablets can be used as a treatment to help people living with overweight or obesity lose weight.

This study will look at the change in participants body weight. Participants will either get semaglutide tablets (new medicine) or placebo tablets ('dummy' medicine that looks like semaglutide but has no effect on the body). For a fair comparison, people are divided into two groups at random by a computer. This process is called randomisation.

Semaglutide tablets are new medicine being tested to treat overweight and obesity. Doctors in many countries can already prescribe semaglutide tablets at lower doses to treat type 2 diabetes.

Participants will get semaglutide or placebo tablets for 68 weeks and will need to take 1 tablet every morning

In addition to taking the medicine, participants will have talks with study staff about:

  • healthy food choices
  • how to be more physically active
  • what participants can do to lose weight The study will last for about 1½ year.Participants will have 14 clinic visits and 7 phone calls with the study doctor. Blood samples will be taken at 10 visits.

Participants will have a test to check their heart done at 3 visits. Women cannot take part if pregnant, breast-feeding or plan to get pregnant during the study period. If participant is a woman and is able to become pregnant, participant will be checked for pregnancy via urine tests.

02

Conditions studied

  • Obesity
  • Overweight
03

In context

Obesity

6,296 studies on the registry are indexed under Obesity; 1,695 are open to participants now.

This study's enrollment of 667 is above the median of 78 across 4,878 interventional studies indexed under Obesity.

Browse Obesity studies →

Lead sponsor

Novo Nordisk A/S is the lead sponsor of 1,370 studies on the registry; 102 are open to participants now.

Of its 198 completed or terminated interventional studies of FDA-regulated products, 94 (47%) have results posted.

Counted across the registry records on this site, refreshed daily.

04

Who can participate

Ages eligible
18 Years and older
Sexes eligible
All
Accepts healthy volunteers
No

Inclusion criteria

  • Male or female, age greater than or equal to 18 years at the time of signing informed consent
  • Body mass index (BMI):

greater than or equal to 27.0 kg/m\^2 with the presence of at least one of the following weight-related complications (treated or untreated): hypertension, dyslipidaemia, obstructive sleep apnoea or cardiovascular disease OR greater than or equal to 30.0 kg/m\^2

  • History of at least one self-reported unsuccessful dietary effort to lose body weight

Exclusion criteria

Exclusion Criteria:

  • HbA1c greater than or equal to 6.5% (48 mmol/mol) as measured by the central laboratory at screening
  • A self-reported change in body weight greater than 5 kg (11 lbs) within 90 days before screening irrespective of medical records
05

Study design

Phase
Phase 3
Primary purpose
Treatment
Allocation
Randomized
Intervention model
Parallel assignment
Masking
Quadruple (Participant, Care provider, Investigator, Outcomes assessor)
Enrollment
667 participants (actual)

Study arms

  • Experimental
    Oral semaglutide

    Participants will receive once daily semaglutide tables in a dose escalating manner for 68 weeks: 3 mg (week 1-4), 7 mg (week 5-8), 14 mg (week 9-12), 25 mg (week 13-16) and 50 mg (week 17-68)

    Drug: Oral semaglutide

  • Placebo comparator
    Oral semaglutide placebo

    All participants are given once daily dose for 68 weeks

    Drug: Placebo (semaglutide)

Interventions

  • DrugOral semaglutide

    Participants will receive a daily dose of oral semaglutide.

  • DrugPlacebo (semaglutide)

    Oral placebo (semaglutide) once daily. Planned treatment duration will be 68 weeks.

06

What researchers measure

Primary outcomes

  1. Percentage Change in Body Weight

    Percentage change in body weight from baseline (week 0) to end-of-treatment (week 68) is presented.

    Time frame: Baseline (week 0), end-of-treatment (week 68)

  2. Number of Participants Who Achieved Weight Loss Greater Than or Equal (≥) 5% (Yes/No)

    Number of participants who achieved weight loss greater than or equal to 5% of their baseline body weight (yes/no) at end-of-treatment (week 68) is presented.

    Time frame: At end-of-treatment (week 68)

Secondary outcomes

  1. Number of Participants Who Achieved Weight Loss Greater Than or Equal (≥) 10% (Yes/No)

    Number of participants who achieved weight loss greater than or equal ≥10% (Yes/No) at end-of-treatment (week 68) is presented.

    Time frame: At end-of-treatment (week 68)

  2. Number of Participants Who Achieved Weight Loss Greater Than or Equal (≥) 15% (Yes/No)

    Number of participants who achieved weight loss greater than or equal (≥) 15% (Yes/No) at end-of-treatment (week 68) is presented.

    Time frame: At end-of-treatment (week 68)

  3. Number of Participants Who Achieved Weight Loss Greater Than or Equal (≥) 20% (Yes/No)

    Number of participants who achieved weight loss greater than or equal (≥) 20% (Yes/No) at end-of-treatment (week 68) is presented.

    Time frame: At end-of-treatment (week 68)

  4. Change in Waist Circumference

    Change in waist circumference from baseline (week 0) to end-of-treatment (week 68) is presented.

    Time frame: Baseline (week 0), end-of-treatment (week 68)

  5. Change in Body Mass Index (BMI)

    Change in BMI from baseline (week 0) to end-of-treatment (week 68) is presented.

    Time frame: Baseline (week 0), end-of-treatment (week 68)

  6. Change in Impact of Weight on Quality of Life-Lite-Clinical Trials Version (IWQOL-Lite-CT) Physical Function

    The IWQOL-Lite-CT is a 20-item, obesity-specific patient-reported outcome (PRO) instrument developed for use in obesity clinical trials. It assesses 2 primary domains of obesity-related health-related quality of life (HRQoL): physical (7 items), and psychosocial (13 items). A 5-item subset of the physical domain, the physical-function composite is also supported. Items in the physical-function composite describe physical impacts related to general and specific physical activities. All items in the physical domain are rated on either a 5-point frequency ("never" to "always") scale or a 5-point truth ("not at all true" to "completely true") scale. Total score of IWQOL-Lite-CT composite ranges from 0 to 100, with higher scores reflecting better quality of life.

    Time frame: Baseline (week 0), end-of-treatment (week 68)

  7. Change in Short Form 36 v2.0 Acute (SF-36) Physical Functioning Domain

    Change in SF-36 v2.0 physical functioning domain from baseline (week 0) to end of treatment (week 68) is presented. The SF-36 form, assesses participants' health-related quality of life (HRQoL) on eight domains of functional health and well-being as well as two component summary scores (physical component summary and mental component summary). The scores for SF-36v2 Acute (SF-36) are norm-based scores, i.e., scores transformed to a scale where the 2009 US general population has a mean of 50 (indicates population mean) with a SD of 10. The range of possible scores for the SF-36 Physical Functioning score is 19.03-57.60. Higher scores indicate better physical functioning. A positive change score indicates an improvement since baseline.

    Time frame: Baseline (week 0), end-of-treatment (week 68)

  8. Change in Systolic Blood Pressure

    Change in systolic blood pressure from baseline (week 0) to end-of-treatment (week 68) is presented.

    Time frame: Baseline (week 0), end-of-treatment (week 68)

  9. Change in Diastolic Blood Pressure

    Change in diastolic blood pressure from baseline (week 0) to end-of-treatment (week 68) is presented.

    Time frame: Baseline (week 0), end-of-treatment (week 68)

  10. Change in Glycosylated Haemoglobin (HbA1c)

    Change in HbA1c from baseline (week 0) to end-of-treatment (week 68) is presented.

    Time frame: Baseline (week 0), end-of-treatment (week 68)

  11. Change in Fasting Plasma Glucose (FPG)

    Change in FPG from baseline (week 0) to end-of-treatment (week 68) is presented.

    Time frame: Baseline (week 0), end-of-treatment (week 68)

  12. Change in Fasting Serum Insulin (Pmol/L) - Ratio to Baseline

    Change in fasting serum insulin (measured in picomoles per liter (pmol/L)) from baseline (week 0) to end-of-treatment (week 68) is presented as ratio to baseline.

    Time frame: Baseline (week 0), end-of-treatment (week 68)

  13. Change in Total Cholesterol (mg/dL) - Ratio to Baseline

    Change in total cholesterol (measured in milligrams per deciliter (mg/dL)) from baseline (week 0) to end-of-treatment (week 68) is presented.

    Time frame: Baseline (week 0), end-of-treatment (week 68)

  14. Change in High Density Lipoprotein (HDL) Cholesterol (mg/dL) - Ratio to Baseline

    Change in high density lipoprotein (HDL) cholesterol (measured in milligrams per deciliter (mg/dL)) from baseline (week 0) to end-of-treatment (week 68) is presented.

    Time frame: Baseline (week 0), end-of-treatment (week 68)

  15. Change in Low Density Lipoprotein (LDL) Cholesterol (mg/dL) - Ratio to Baseline

    Change in low density lipoprotein (LDL) cholesterol (measured in milligrams per deciliter (mg/dL)) from baseline (week 0) to end-of-treatment (week 68) is presented.

    Time frame: Baseline (week 0), end-of-treatment (week 68)

  16. Change in Very Low Density Lipoprotein (VLDL) Cholesterol (mg/dL) - Ratio to Baseline

    Change in very low density lipoprotein (VLDL) cholesterol (measured in milligrams per deciliter (mg/dL)) from baseline (week 0) to end-of-treatment (week 68) is presented.

    Time frame: Baseline (week 0), end-of-treatment (week 68)

  17. Change in Triglycerides (mg/dL) - Ratio to Baseline

    Change in triglycerides (measured in milligrams per deciliter (mg/dL)) from baseline (week 0) to end-of-treatment (week 68) is presented.

    Time frame: Baseline (week 0), end-of-treatment (week 68)

  18. Change in Free Fatty Acids (mg/dL) - Ratio to Baseline

    Change in free fatty acids (measured in milligrams per deciliter (mg/dL)) from baseline (week 0) to end-of-treatment (week 68) is presented.

    Time frame: Baseline (week 0), end-of-treatment (week 68)

  19. Change in High Sensitivity C-reactive Protein (hsCRP) (mg/L) - Ratio to Baseline

    Change in high sensitivity C-reactive protein (measured in Milligrams per liter (mg/L)) from baseline (week 0) to end-of-treatment (week 68) is presented.

    Time frame: Baseline (week 0), end-of-treatment (week 68)

  20. Number of Treatment Emergent Adverse Events

    Number of treatment emergent adverse events from baseline (week 0) to end-of-study (week 75) is presented. An adverse event is any untoward medical occurrence in a clinical trial participant that is temporally associated with the use of an investigational medicinal product (IMP), whether or not considered related to the IMP. Treatment emergent adverse events (TEAEs): events that had onset date during on-treatment period. It is the time period in which participant was considered exposed to trial product.

    Time frame: From baseline (week 0) to end-of-study (week 75)

  21. Number of Serious Adverse Events

    Number of serious adverse events from baseline (week 0) to end-of-study (week 75) is presented. A serious adverse event (SAE) was defined as any event that resulted in any of the following: death, life-threatening experience, in-patient hospitalisation or prolongation of existing hospitalisation, persistent or significant disability or incapacity, congenital anomaly or birth defect or important medical event.

    Time frame: From baseline (week 0) to end-of-study (week 75)

  22. Change in Body Weight - Kilogram (Kg)

    Change in body weight from baseline (week 0) to end-of-treatment (week 68) is presented.

    Time frame: Baseline (week 0), end-of-treatment (week 68)

  23. Number of Participants With Body Mass Index (BMI) Greater Than or Equal (≥) 30 at Baseline and BMI Lesser Than (<) 30 at Week 68 (Yes/no)

    Number of participants who's body mass index (BMI) greater than or equal (≥) 30 at baseline and BMI lesser than (\<) 30 at week 68 (yes/no) from (week 0) to end-of-treatment (week 68) is presented.

    Time frame: At end-of-treatment (week 68)

  24. Change in Pulse

    Change in pulse from baseline (week 0) to end-of-study (week 68) is presented.

    Time frame: Baseline (week 0), end-of-treatment (week 68)

  25. Number of Participants at Baseline and End of Treatment in Glycaemic Category (Normo-glycaemia, Pre-diabetes, Type 2 Diabetes)

    Number of participants in glycaemic categories, "normo-glycaemia, pre-diabetes and type 2 diabetes" at baseline (week 0) and end-of-treatment (week 68) are presented. These categories were set as per the following criteria: 1) Normo-glycaemia: glycated haemoglobin (HbA1c) less than (\<) 5.7%; 2) Pre-diabetes: HbA1c 5.7 - 6.4% (both inclusive); 3) Type 2 diabetes: HbA1c greater than or equal to (\>=) 6.5%.

    Time frame: Baseline (week 0), end-of-treatment (week 68)

  26. Number of Participants With Change in Impact of Weight on Quality of Life-Lite-Clinical Trials Version (IWQOL-Lite-CT) Physical Function Domain (PFD) Greater Than or Equal (≥) 14.6 (Yes/No)

    The IWQOL-Lite-CT (measured as score on a scale) is a 20-item, obesity-specific PRO instrument developed for use in obesity clinical trials. It assesses 2 primary domains of obesity-related health-related quality of life (HRQoL): physical (7 items), and psychosocial (13 items). A 5-item subset of the physical domain, the physical-function composite is also supported. Items in the physical-function composite describe physical impacts related to general and specific physical activities. All items in the physical domain are rated on either a 5-point frequency ("never" to "always") scale or a 5-point truth ("not at all true" to "completely true") scale. Total score of IWQOL-Lite-CT composite ranges from 0 to 100, with higher scores reflecting better quality of life.

    Time frame: At end-of-treatment (week 68)

  27. Number of Participants With Change in Short Form 36 v2.0 Acute (SF-36) Physical Functioning Score Greater Than or Equal (≥) 3.7 (Yes/No)

    Number of participants with change in SF-36 v2.0 physical functioning score ≥ 3.7 (yes/no) is presented. The SF-36 form, assesses participants' health-related quality of life (HRQoL) on eight domains of functional health and well-being as well as two component summary scores (physical component summary and mental component summary). A positive change score indicates an improvement since baseline. The scores for SF-36v2 Acute (SF-36) are norm-based scores, i.e., scores transformed to a scale where the 2009 US general population has a mean of 50 and an SD of 10. The range of possible scores for the SF-36 Physical Functioning score is 19.03-57.60. Higher scores indicate better physical functioning.

    Time frame: From baseline (week 0) to end-of-treatment (week 68)

07

Results

Posted May 7, 2026

Participant flow

The trial was conducted at 50 sites in 9 countries as follows: Canada (5 sites), Denmark (3 sites), Finland (3 sites), France (5 sites), Germany (7 sites), Japan (3 sites), Poland (5 sites), Russia (8 sites) and United States (11 sites).

Participant flow — Overall Study
MilestoneOral Semaglutide 50 mgPlacebo
Started334333
Full analysis set334333
Safety analysis set334333
Completed320307
Not completed1426
Withdrew: Withdrawal by subject1011
Withdrew: Lost to follow-up414
Withdrew: Physician decision01

Outcome measures

PrimaryPercentage Change in Body Weight

Percentage change in body weight from baseline (week 0) to end-of-treatment (week 68) is presented.

Time frame:
Baseline (week 0), end-of-treatment (week 68)
Reported as:
Mean · Percentage (%) change in body weight
Percentage Change in Body Weight
Percentage (%) change in body weightOral Semaglutide 50 mgPlacebo
Percentage Change in Body Weight-15.8 ± 10.3-2.2 ± 7.2
Statistical analysis
  • Oral Semaglutide 50 mg vs Placebo · ANCOVA · p = <0.0001 · Treatment difference: -12.74 · 95% CI -14.15 to -11.33
  • Oral Semaglutide 50 mg vs Placebo · Mixed Models Analysis · p = <0.0001 · Treatment difference: -15.63 · 95% CI -17.07 to -14.18
PrimaryNumber of Participants Who Achieved Weight Loss Greater Than or Equal (≥) 5% (Yes/No)

Number of participants who achieved weight loss greater than or equal to 5% of their baseline body weight (yes/no) at end-of-treatment (week 68) is presented.

Time frame:
At end-of-treatment (week 68)
Reported as:
Count of participants · Participants
Number of Participants Who Achieved Weight Loss Greater Than or Equal (≥) 5% (Yes/No)
ParticipantsOral Semaglutide 50 mgPlacebo
Yes26976
No48219
Statistical analysis
  • Oral Semaglutide 50 mg vs Placebo · Regression, Logistic · p = <0.0001 · Odds ratio (or): 12.62 · 95% CI 8.50 to 18.74
  • Oral Semaglutide 50 mg vs Placebo · Regression, Logistic · p = <0.0001 · Odds ratio (or): 55.21 · 95% CI 32.98 to 92.41
SecondaryNumber of Participants Who Achieved Weight Loss Greater Than or Equal (≥) 10% (Yes/No)

Number of participants who achieved weight loss greater than or equal ≥10% (Yes/No) at end-of-treatment (week 68) is presented.

Time frame:
At end-of-treatment (week 68)
Reported as:
Count of participants · Participants
Number of Participants Who Achieved Weight Loss Greater Than or Equal (≥) 10% (Yes/No)
ParticipantsOral Semaglutide 50 mgPlacebo
Yes22035
No97260
SecondaryNumber of Participants Who Achieved Weight Loss Greater Than or Equal (≥) 15% (Yes/No)

Number of participants who achieved weight loss greater than or equal (≥) 15% (Yes/No) at end-of-treatment (week 68) is presented.

Time frame:
At end-of-treatment (week 68)
Reported as:
Count of participants · Participants
Number of Participants Who Achieved Weight Loss Greater Than or Equal (≥) 15% (Yes/No)
ParticipantsOral Semaglutide 50 mgPlacebo
Yes17017
No147278
SecondaryNumber of Participants Who Achieved Weight Loss Greater Than or Equal (≥) 20% (Yes/No)

Number of participants who achieved weight loss greater than or equal (≥) 20% (Yes/No) at end-of-treatment (week 68) is presented.

Time frame:
At end-of-treatment (week 68)
Reported as:
Count of participants · Participants
Number of Participants Who Achieved Weight Loss Greater Than or Equal (≥) 20% (Yes/No)
ParticipantsOral Semaglutide 50 mgPlacebo
Yes1078
No210287
SecondaryChange in Waist Circumference

Change in waist circumference from baseline (week 0) to end-of-treatment (week 68) is presented.

Time frame:
Baseline (week 0), end-of-treatment (week 68)
Reported as:
Mean · centimeter (cm)
Change in Waist Circumference
centimeter (cm)Oral Semaglutide 50 mgPlacebo
Change in Waist Circumference-13.4 ± 10.0-2.8 ± 7.3
SecondaryChange in Body Mass Index (BMI)

Change in BMI from baseline (week 0) to end-of-treatment (week 68) is presented.

Time frame:
Baseline (week 0), end-of-treatment (week 68)
Reported as:
Mean · Kilogram per meter square (kg/m^2)
Change in Body Mass Index (BMI)
Kilogram per meter square (kg/m^2)Oral Semaglutide 50 mgPlacebo
Change in Body Mass Index (BMI)-5.9 ± 4.0-0.9 ± 2.8
SecondaryChange in Impact of Weight on Quality of Life-Lite-Clinical Trials Version (IWQOL-Lite-CT) Physical Function

The IWQOL-Lite-CT is a 20-item, obesity-specific patient-reported outcome (PRO) instrument developed for use in obesity clinical trials. It assesses 2 primary domains of obesity-related health-related quality of life (HRQoL): physical (7 items), and psychosocial (13 items). A 5-item subset of the physical domain, the physical-function composite is also supported. Items in the physical-function composite describe physical impacts related to general and specific physical activities. All items in the physical domain are rated on either a 5-point frequency ("never" to "always") scale or a 5-point truth ("not at all true" to "completely true") scale. Total score of IWQOL-Lite-CT composite ranges from 0 to 100, with higher scores reflecting better quality of life.

Time frame:
Baseline (week 0), end-of-treatment (week 68)
Reported as:
Mean · Score on a scale
Change in Impact of Weight on Quality of Life-Lite-Clinical Trials Version (IWQOL-Lite-CT) Physical Function
Score on a scaleOral Semaglutide 50 mgPlacebo
Change in Impact of Weight on Quality of Life-Lite-Clinical Trials Version (IWQOL-Lite-CT) Physical Function14.5 ± 20.25.0 ± 19.9
SecondaryChange in Short Form 36 v2.0 Acute (SF-36) Physical Functioning Domain

Change in SF-36 v2.0 physical functioning domain from baseline (week 0) to end of treatment (week 68) is presented. The SF-36 form, assesses participants' health-related quality of life (HRQoL) on eight domains of functional health and well-being as well as two component summary scores (physical component summary and mental component summary). The scores for SF-36v2 Acute (SF-36) are norm-based scores, i.e., scores transformed to a scale where the 2009 US general population has a mean of 50 (indicates population mean) with a SD of 10. The range of possible scores for the SF-36 Physical Functioning score is 19.03-57.60. Higher scores indicate better physical functioning. A positive change score indicates an improvement since baseline.

Time frame:
Baseline (week 0), end-of-treatment (week 68)
Reported as:
Mean · Score on a scale
Change in Short Form 36 v2.0 Acute (SF-36) Physical Functioning Domain
Score on a scaleOral Semaglutide 50 mgPlacebo
Change in Short Form 36 v2.0 Acute (SF-36) Physical Functioning Domain2.4 ± 5.7-0.0 ± 5.4
SecondaryChange in Systolic Blood Pressure

Change in systolic blood pressure from baseline (week 0) to end-of-treatment (week 68) is presented.

Time frame:
Baseline (week 0), end-of-treatment (week 68)
Reported as:
Mean · Millimeter of mercury (mmHg)
Change in Systolic Blood Pressure
Millimeter of mercury (mmHg)Oral Semaglutide 50 mgPlacebo
Change in Systolic Blood Pressure-7 ± 14-1 ± 14
SecondaryChange in Diastolic Blood Pressure

Change in diastolic blood pressure from baseline (week 0) to end-of-treatment (week 68) is presented.

Time frame:
Baseline (week 0), end-of-treatment (week 68)
Reported as:
Mean · Millimeter of mercury (mmHg)
Change in Diastolic Blood Pressure
Millimeter of mercury (mmHg)Oral Semaglutide 50 mgPlacebo
Change in Diastolic Blood Pressure-2 ± 9-1 ± 10
SecondaryChange in Glycosylated Haemoglobin (HbA1c)

Change in HbA1c from baseline (week 0) to end-of-treatment (week 68) is presented.

Time frame:
Baseline (week 0), end-of-treatment (week 68)
Reported as:
Mean · Percentage of HbA1c
Change in Glycosylated Haemoglobin (HbA1c)
Percentage of HbA1cOral Semaglutide 50 mgPlacebo
Change in Glycosylated Haemoglobin (HbA1c)-0.2 ± 0.30.1 ± 0.3
SecondaryChange in Fasting Plasma Glucose (FPG)

Change in FPG from baseline (week 0) to end-of-treatment (week 68) is presented.

Time frame:
Baseline (week 0), end-of-treatment (week 68)
Reported as:
Mean · Milligrams per deciliter (mg/dL)
Change in Fasting Plasma Glucose (FPG)
Milligrams per deciliter (mg/dL)Oral Semaglutide 50 mgPlacebo
Change in Fasting Plasma Glucose (FPG)-10.3 ± 12.7-1.8 ± 10.4
SecondaryChange in Fasting Serum Insulin (Pmol/L) - Ratio to Baseline

Change in fasting serum insulin (measured in picomoles per liter (pmol/L)) from baseline (week 0) to end-of-treatment (week 68) is presented as ratio to baseline.

Time frame:
Baseline (week 0), end-of-treatment (week 68)
Reported as:
Geometric mean · Ratio of fasting serum insulin
Change in Fasting Serum Insulin (Pmol/L) - Ratio to Baseline
Ratio of fasting serum insulinOral Semaglutide 50 mgPlacebo
Change in Fasting Serum Insulin (Pmol/L) - Ratio to Baseline0.67 ± 71.40.94 ± 55.3
SecondaryChange in Total Cholesterol (mg/dL) - Ratio to Baseline

Change in total cholesterol (measured in milligrams per deciliter (mg/dL)) from baseline (week 0) to end-of-treatment (week 68) is presented.

Time frame:
Baseline (week 0), end-of-treatment (week 68)
Reported as:
Geometric mean · Ratio of total cholesterol
Change in Total Cholesterol (mg/dL) - Ratio to Baseline
Ratio of total cholesterolOral Semaglutide 50 mgPlacebo
Change in Total Cholesterol (mg/dL) - Ratio to Baseline0.97 ± 17.11.01 ± 16.6
SecondaryChange in High Density Lipoprotein (HDL) Cholesterol (mg/dL) - Ratio to Baseline

Change in high density lipoprotein (HDL) cholesterol (measured in milligrams per deciliter (mg/dL)) from baseline (week 0) to end-of-treatment (week 68) is presented.

Time frame:
Baseline (week 0), end-of-treatment (week 68)
Reported as:
Geometric mean · Ratio of HDL cholesterol
Change in High Density Lipoprotein (HDL) Cholesterol (mg/dL) - Ratio to Baseline
Ratio of HDL cholesterolOral Semaglutide 50 mgPlacebo
Change in High Density Lipoprotein (HDL) Cholesterol (mg/dL) - Ratio to Baseline1.05 ± 16.61.01 ± 15.9
SecondaryChange in Low Density Lipoprotein (LDL) Cholesterol (mg/dL) - Ratio to Baseline

Change in low density lipoprotein (LDL) cholesterol (measured in milligrams per deciliter (mg/dL)) from baseline (week 0) to end-of-treatment (week 68) is presented.

Time frame:
Baseline (week 0), end-of-treatment (week 68)
Reported as:
Geometric mean · Ratio of LDL cholesterol
Change in Low Density Lipoprotein (LDL) Cholesterol (mg/dL) - Ratio to Baseline
Ratio of LDL cholesterolOral Semaglutide 50 mgPlacebo
Change in Low Density Lipoprotein (LDL) Cholesterol (mg/dL) - Ratio to Baseline0.98 ± 25.81.03 ± 26.7
SecondaryChange in Very Low Density Lipoprotein (VLDL) Cholesterol (mg/dL) - Ratio to Baseline

Change in very low density lipoprotein (VLDL) cholesterol (measured in milligrams per deciliter (mg/dL)) from baseline (week 0) to end-of-treatment (week 68) is presented.

Time frame:
Baseline (week 0), end-of-treatment (week 68)
Reported as:
Geometric mean · Ratio of VLDL cholesterol
Change in Very Low Density Lipoprotein (VLDL) Cholesterol (mg/dL) - Ratio to Baseline
Ratio of VLDL cholesterolOral Semaglutide 50 mgPlacebo
Change in Very Low Density Lipoprotein (VLDL) Cholesterol (mg/dL) - Ratio to Baseline0.77 ± 38.30.96 ± 37.2
SecondaryChange in Triglycerides (mg/dL) - Ratio to Baseline

Change in triglycerides (measured in milligrams per deciliter (mg/dL)) from baseline (week 0) to end-of-treatment (week 68) is presented.

Time frame:
Baseline (week 0), end-of-treatment (week 68)
Reported as:
Geometric mean · Ratio of triglycerides
Change in Triglycerides (mg/dL) - Ratio to Baseline
Ratio of triglyceridesOral Semaglutide 50 mgPlacebo
Change in Triglycerides (mg/dL) - Ratio to Baseline0.77 ± 38.40.96 ± 37.5
SecondaryChange in Free Fatty Acids (mg/dL) - Ratio to Baseline

Change in free fatty acids (measured in milligrams per deciliter (mg/dL)) from baseline (week 0) to end-of-treatment (week 68) is presented.

Time frame:
Baseline (week 0), end-of-treatment (week 68)
Reported as:
Geometric mean · Ratio of free fatty acids
Change in Free Fatty Acids (mg/dL) - Ratio to Baseline
Ratio of free fatty acidsOral Semaglutide 50 mgPlacebo
Change in Free Fatty Acids (mg/dL) - Ratio to Baseline0.87 ± 71.71.00 ± 80.2
SecondaryChange in High Sensitivity C-reactive Protein (hsCRP) (mg/L) - Ratio to Baseline

Change in high sensitivity C-reactive protein (measured in Milligrams per liter (mg/L)) from baseline (week 0) to end-of-treatment (week 68) is presented.

Time frame:
Baseline (week 0), end-of-treatment (week 68)
Reported as:
Geometric mean · Ratio of hsCRP
Change in High Sensitivity C-reactive Protein (hsCRP) (mg/L) - Ratio to Baseline
Ratio of hsCRPOral Semaglutide 50 mgPlacebo
Change in High Sensitivity C-reactive Protein (hsCRP) (mg/L) - Ratio to Baseline0.42 ± 129.90.85 ± 117.9
SecondaryNumber of Treatment Emergent Adverse Events

Number of treatment emergent adverse events from baseline (week 0) to end-of-study (week 75) is presented. An adverse event is any untoward medical occurrence in a clinical trial participant that is temporally associated with the use of an investigational medicinal product (IMP), whether or not considered related to the IMP. Treatment emergent adverse events (TEAEs): events that had onset date during on-treatment period. It is the time period in which participant was considered exposed to trial product.

Time frame:
From baseline (week 0) to end-of-study (week 75)
Reported as:
Number · Events
Number of Treatment Emergent Adverse Events
EventsOral Semaglutide 50 mgPlacebo
Number of Treatment Emergent Adverse Events25001577
SecondaryNumber of Serious Adverse Events

Number of serious adverse events from baseline (week 0) to end-of-study (week 75) is presented. A serious adverse event (SAE) was defined as any event that resulted in any of the following: death, life-threatening experience, in-patient hospitalisation or prolongation of existing hospitalisation, persistent or significant disability or incapacity, congenital anomaly or birth defect or important medical event.

Time frame:
From baseline (week 0) to end-of-study (week 75)
Reported as:
Number · Events
Number of Serious Adverse Events
EventsOral Semaglutide 50 mgPlacebo
Number of Serious Adverse Events4448
SecondaryChange in Body Weight - Kilogram (Kg)

Change in body weight from baseline (week 0) to end-of-treatment (week 68) is presented.

Time frame:
Baseline (week 0), end-of-treatment (week 68)
Reported as:
Mean · Kilogram (kg)
Change in Body Weight - Kilogram (Kg)
Kilogram (kg)Oral Semaglutide 50 mgPlacebo
Change in Body Weight - Kilogram (Kg)-16.1 ± 10.9-2.4 ± 7.9
SecondaryNumber of Participants With Body Mass Index (BMI) Greater Than or Equal (≥) 30 at Baseline and BMI Lesser Than (<) 30 at Week 68 (Yes/no)

Number of participants who's body mass index (BMI) greater than or equal (≥) 30 at baseline and BMI lesser than (\<) 30 at week 68 (yes/no) from (week 0) to end-of-treatment (week 68) is presented.

Time frame:
At end-of-treatment (week 68)
Reported as:
Count of participants · Participants
Number of Participants With Body Mass Index (BMI) Greater Than or Equal (≥) 30 at Baseline and BMI Lesser Than (<) 30 at Week 68 (Yes/no)
ParticipantsOral Semaglutide 50 mgPlacebo
Yes12919
No165249
SecondaryChange in Pulse

Change in pulse from baseline (week 0) to end-of-study (week 68) is presented.

Time frame:
Baseline (week 0), end-of-treatment (week 68)
Reported as:
Mean · Beats/min
Change in Pulse
Beats/minOral Semaglutide 50 mgPlacebo
Change in Pulse4 ± 9-0 ± 8
SecondaryNumber of Participants at Baseline and End of Treatment in Glycaemic Category (Normo-glycaemia, Pre-diabetes, Type 2 Diabetes)

Number of participants in glycaemic categories, "normo-glycaemia, pre-diabetes and type 2 diabetes" at baseline (week 0) and end-of-treatment (week 68) are presented. These categories were set as per the following criteria: 1) Normo-glycaemia: glycated haemoglobin (HbA1c) less than (\<) 5.7%; 2) Pre-diabetes: HbA1c 5.7 - 6.4% (both inclusive); 3) Type 2 diabetes: HbA1c greater than or equal to (\>=) 6.5%.

Time frame:
Baseline (week 0), end-of-treatment (week 68)
Reported as:
Count of participants · Participants
Number of Participants at Baseline and End of Treatment in Glycaemic Category (Normo-glycaemia, Pre-diabetes, Type 2 Diabetes)
ParticipantsOral Semaglutide 50 mgPlacebo
Baseline (week 0) — normo-glycaemia200200
Baseline (week 0) — pre-diabetes132130
Baseline (week 0) — type 2 diabetes23
week 68 — normo-glycaemia274139
week 68 — pre-diabetes36143
week 68 — type 2 diabetes14
SecondaryNumber of Participants With Change in Impact of Weight on Quality of Life-Lite-Clinical Trials Version (IWQOL-Lite-CT) Physical Function Domain (PFD) Greater Than or Equal (≥) 14.6 (Yes/No)

The IWQOL-Lite-CT (measured as score on a scale) is a 20-item, obesity-specific PRO instrument developed for use in obesity clinical trials. It assesses 2 primary domains of obesity-related health-related quality of life (HRQoL): physical (7 items), and psychosocial (13 items). A 5-item subset of the physical domain, the physical-function composite is also supported. Items in the physical-function composite describe physical impacts related to general and specific physical activities. All items in the physical domain are rated on either a 5-point frequency ("never" to "always") scale or a 5-point truth ("not at all true" to "completely true") scale. Total score of IWQOL-Lite-CT composite ranges from 0 to 100, with higher scores reflecting better quality of life.

Time frame:
At end-of-treatment (week 68)
Reported as:
Count of participants · Participants
Number of Participants With Change in Impact of Weight on Quality of Life-Lite-Clinical Trials Version (IWQOL-Lite-CT) Physical Function Domain (PFD) Greater Than or Equal (≥) 14.6 (Yes/No)
ParticipantsOral Semaglutide 50 mgPlacebo
Yes14987
No149191
SecondaryNumber of Participants With Change in Short Form 36 v2.0 Acute (SF-36) Physical Functioning Score Greater Than or Equal (≥) 3.7 (Yes/No)

Number of participants with change in SF-36 v2.0 physical functioning score ≥ 3.7 (yes/no) is presented. The SF-36 form, assesses participants' health-related quality of life (HRQoL) on eight domains of functional health and well-being as well as two component summary scores (physical component summary and mental component summary). A positive change score indicates an improvement since baseline. The scores for SF-36v2 Acute (SF-36) are norm-based scores, i.e., scores transformed to a scale where the 2009 US general population has a mean of 50 and an SD of 10. The range of possible scores for the SF-36 Physical Functioning score is 19.03-57.60. Higher scores indicate better physical functioning.

Time frame:
From baseline (week 0) to end-of-treatment (week 68)
Reported as:
Count of participants · Participants
Number of Participants With Change in Short Form 36 v2.0 Acute (SF-36) Physical Functioning Score Greater Than or Equal (≥) 3.7 (Yes/No)
ParticipantsOral Semaglutide 50 mgPlacebo
Yes11356
No190224

Adverse events

Collected over From baseline (week 0) to end-of-study (week 75). Non-serious events are listed at a 5% frequency threshold.

Adverse event summary by group
GroupDeathsSeriousOther
Oral Semaglutide 50 mg0/334 (0%)32/334 (9.6%)292/334 (87.4%)
Placebo0/333 (0%)29/333 (8.7%)242/333 (72.7%)
Most frequent serious events
Showing 10 of 73
Most frequent serious events
EventOral Semaglutide 50 mgPlacebo
OsteoarthritisMusculoskeletal and connective tissue disorders0/3344/333
CholelithiasisHepatobiliary disorders4/3340/333
Acute myocardial infarctionCardiac disorders0/3342/333
ArthritisMusculoskeletal and connective tissue disorders0/3342/333
Urinary tract infectionInfections and infestations0/3342/333
COVID-19 pneumoniaInfections and infestations2/3340/333
Adjustment disorder with depressed moodPsychiatric disorders0/3341/333
Angina pectorisCardiac disorders0/3341/333
AppendicitisInfections and infestations1/3341/333
COVID-19Infections and infestations1/3341/333
Most frequent other events
Showing 10 of 26
Most frequent other events
EventOral Semaglutide 50 mgPlacebo
NauseaGastrointestinal disorders173/33451/333
COVID-19Infections and infestations119/334115/333
ConstipationGastrointestinal disorders92/33450/333
DiarrhoeaGastrointestinal disorders89/33456/333
VomitingGastrointestinal disorders80/33412/333
Decreased appetiteMetabolism and nutrition disorders56/33424/333
NasopharyngitisInfections and infestations38/33449/333
DyspepsiaGastrointestinal disorders47/33417/333
HeadacheNervous system disorders46/33429/333
ArthralgiaMusculoskeletal and connective tissue disorders22/33438/333

Baseline characteristics

Full analysis set (FAS): All participants randomised according to the randomised treatment.

Age, Continuous
Age, Continuous(Years)Oral Semaglutide 50 mgPlaceboTotal
Mean49 ± 1350 ± 1250 ± 13
Sex: Female, Male
Sex: Female, Male(Participants)Oral Semaglutide 50 mgPlaceboTotal
Female247238485
Male8795182
Ethnicity (NIH/OMB)
Ethnicity (NIH/OMB)(Participants)Oral Semaglutide 50 mgPlaceboTotal
Hispanic or Latino141327
Not Hispanic or Latino288296584
Unknown or Not Reported322456
Race/Ethnicity, Customized
Race/Ethnicity, Customized(Participants)Oral Semaglutide 50 mgPlaceboTotal
White246248494
Black or African American212243
Asian363672
Native Hawaiian or Other Pacific Islander213
Other134
Not Reported282351
08

Study locations

56 sites
  • Univ of Alabama Birmingham
    Birmingham, Alabama 35233, United States
  • Velocity Clin Res Los Angeles
    Los Angeles, California 90017, United States
  • The Chappel Group Research
    Kissimmee, Florida 34744, United States
  • Clinical Trial Res Assoc,Inc
    Plantation, Florida 33324, United States
  • East West Med Res Inst
    Honolulu, Hawaii 96814, United States
  • Midwest Inst For Clin Res
    Indianapolis, Indiana 46260, United States
  • Rochester Clinical Research, Inc.
    Rochester, New York 14609, United States
  • Accellacare
    Wilmington, North Carolina 28401, United States
  • The University of Penn Center
    Philadelphia, Pennsylvania 19104-3317, United States
  • Velocity Clinical Res-Dallas
    Dallas, Texas 75230, United States
  • Washington Cntr Weight Mgmt
    Arlington, Virginia 22206, United States
  • Selma Medical Associates
    Winchester, Virginia 22601-3834, United States
  • Capital Clin Res Ctr,LLC
    Olympia, Washington 98502, United States
  • Ocean West Research Clinic
    Surrey, British Columbia V3Z 2N6, Canada
  • G.A. Research Associates Ltd.
    Moncton, New Brunswick E1G 1A7, Canada
  • Nova Scotia Health Authority
    Halifax, Nova Scotia B3H 1V7, Canada
  • Wharton Medical Clinic Clinical Trials (Hamilton)
    Hamilton, Ontario L8L 5G8, Canada
  • Premier Clinical Trial Research Network (PCTRN)
    Hamilton, Ontario L8M 1K7, Canada
  • Sjællands Universitetshospital, Køge - Medicinsk Afdeling
    Køge, Region Sjælland 4600, Denmark
  • Gentofte Hospital - Center for Klinisk Metabolisk Forskning
    Hellerup, 2900, Denmark
  • Hvidovre Hospital Endokrinologisk forsknings afsnit 159
    Hvidovre, 2650, Denmark
  • Slagelse Sygehus Ambulatorium for hjertesygdomme
    Slagelse, 4200, Denmark
  • Obesity Research Unit
    Helsinki, 00014, Finland
  • StudyCor
    Jyväskylä, 40620, Finland
  • Seinäjoen keskussairaala
    Seinäjoki, 60220, Finland
  • Les Hopitaux de Chartres-Hopital Louis Pasteur
    Le Coudray, 28630, France
  • Fondation Hôtel-Dieu
    Le Creusot, 71200, France
  • Groupe Sos Sante-Hopital Le Creusot-Hotel Dieu-2
    Le Creusot, 71200, France
  • Centre Hospitalier Universitaire de Bordeaux-Hopital Haut Leveque-2
    Pessac, 33600, France
  • Centre Hospitalier Universitaire de Nantes-Hopital Nord Laennec
    Saint-Herblain, 44800, France
  • Centre Hospitalier Universitaire de Toulouse-Hopital Rangueil-2
    Toulouse, 31054, France
  • Centre de Recherche Clinique Portes Du Sud
    Vénissieux, 69200, France
  • InnoDiab Forschung GmbH
    Essen, 45136, Germany
  • Praxis Dr. med. M. Esser
    Essen, 45219, Germany
  • Diabetes Zentrum Wandsbek Berufsausuebungsgemeinschaft GbR
    Hamburg, 22041, Germany
  • Dr. Milek medikum
    Hohenmölsen, 06679, Germany
  • RED-Institut für medizinische Forschung und Fortbildung GmbH
    Oldenburg in Holstein, 23758, Germany
  • Praxis Dr. med. Wenzl-Bauer
    Rehlingen-Siersburg, 66780, Germany
  • MZM Praxis Drs. Erlinger
    Stuttgart, 70378, Germany
  • Zentrum für klinische Studien Allgäu Oberschwaben
    Wangen, 88239, Germany
  • Chiba University Hospital_Diabetes, Metabolism and Endocrinology
    Chiba-shi, Chiba, 260-8677, Japan
  • Suidoubashi Medical Clinic_Internal Medicine
    Chiyoda-ku, Tokyo, 101-0065, Japan
  • Higashi-shinjuku clinic
    Tokyo, 169-0072, Japan
  • NZOZ Przychodnia Specjalistyczna Medica
    Lublin, Lubelski 20-538, Poland
  • Gabinet Leczenia Otylosci i Chorob Dietozaleznych
    Bialystok, Podlaskie Voivodeship 15-281, Poland
  • Centrum Medyczne Pratia Gdynia
    Gdynia, Pomeranian Voivodeship 81-338, Poland
  • Centrum Zdrowia Metabolicznego Paweł Bogdański
    Poznan, Wielkopolskie Voivodeship 60-589, Poland
  • Centrum Terapii Wspolczesnej J.M. Jasnorzewska S.K.A.
    Lodz, 90-338, Poland
  • Tumen State Medical University
    Tyumen, Russia 625023, Russia
  • LLC "Clinic of new technologies in Medicine"
    Dzerzhinskiy, 140091, Russia
  • FSBI 'I.I. Dedov National Medical Research Center of Endocrinology' of the MH of Russia
    Moscow, 117292, Russia
  • Endocrinological Dispensary of Department of healthcare ser.
    Moscow, 119034, Russia
  • Federal Bureau for Medical and Social Expertise
    Moscow, 127486, Russia
  • Joint Stock Company "Polyclinic Complex"
    Saint Petersburg, 190013, Russia
  • Leningrad Regional Clinical Hospital
    Saint Petersburg, 194291, Russia
  • Joint Stock Company "Medical technologies"
    Yekaterinburg, 620075, Russia
09

References and documents

Publications

  • Knop FK, Aroda VR, do Vale RD, Holst-Hansen T, Laursen PN, Rosenstock J, Rubino DM, Garvey WT; OASIS 1 Investigators. Oral semaglutide 50 mg taken once per day in adults with overweight or obesity (OASIS 1): a randomised, double-blind, placebo-controlled, phase 3 trial. Lancet. 2023 Aug 26;402(10403):705-719. doi: 10.1016/S0140-6736(23)01185-6. Epub 2023 Jun 26. PubMed 37385278 ↗

Study documents

  • Study protocol · Nov 25, 2021
  • Statistical analysis plan · Mar 24, 2023

Documents are hosted by the registry — open the source record to download them.

Individual participant data

Plan to share: Yes — "According to the Novo Nordisk disclosure commitment on novonordisk-trials.com"

10

Updates

Tracking since Sep 25, 2026
No changes since tracking began. The registry record was last updated on May 7, 2026, before this site started recording changes on Sep 25, 2026. Its history is on ClinicalTrials.gov ↗
11

Registry details

Key details

Study ID
NCT05035095
Lead sponsor
Novo Nordisk A/S
Responsible party
Sponsor
First posted
Sep 5, 2021
Start date
Sep 13, 2021
Primary completion
Mar 24, 2023
Completion
May 12, 2023
Results posted
May 7, 2026
Last update
May 7, 2026

Study contacts

Clinical Transparency (dept. 1452)
study director · Novo Nordisk A/S

Oversight

Data monitoring committee
No
FDA-regulated drug
Yes
FDA-regulated device
No
View the source record on ClinicalTrials.gov ↗

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This study is completed, as verified in Apr 2026. You cannot join it, but the record below documents what was studied.

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