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CompletedNCT01113619Updated Dec 8, 2011

Effectiveness, Safety and Tolerability Study of RP-G28 for Symptoms Associated With Lactose Intolerance

A Phase 2 interventional study of RP-G28 or placebo and RP-G28 or placebo in Lactose Intolerance, sponsored by Ritter Pharmaceuticals, Inc.. Completed at 2 sites in United States. Open to participants aged 18 Years to 64 Years. Per ClinicalTrials.gov, last updated 2011-12-08.

Sponsored by Ritter Pharmaceuticals, Inc. · Phase 2, Interventional, and Treatment

Phase
Phase 2
Study type
Interventional
Enrollment
61
Allocation
Randomized
Ages
18 Years to 64 Years
Sex
All
01

Study summary

This is a Phase 2 study designed to assess the ability of RP-G28 to improve lactose digestion and tolerance.

Read the detailed description

Lactose intolerance is a common gastrointestinal (GI) disorder that develops in lactose maldigesters when consuming too much lactose or when lactose is added to a previously low-lactose diet. Lactose intolerance is characterized by one or more of the cardinal symptoms that follow the ingestion of lactose-containing foods. These symptoms include; abdominal pain/cramps, bloating, flatulence [gas] and diarrhea. As such, most lactose intolerant individuals avoid the ingestion of milk and dairy products, while others substitute non-lactose containing products in their diet.

Based on the health implications from insufficient calcium intake over a lifetime, including increased risk of osteoporosis and hypertension, there is need in the medical community for a tolerable and convenient treatment that allows for all levels of milk and dairy product consumption in people suffering from mild to severe lactose intolerance. This study will evaluate a treatment that provides a simplified dosing regimen as well as the potential for extended relief from symptoms following a limited therapy regimen.

02

Conditions studied

  • Lactose Intolerance

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Keywords

  • lactose maldigestion
  • dairy intolerance
  • intolerance to milk
  • intolerance to dairy
  • milk intolerance
  • GI disorder
  • lactose metabolism
  • GI symptoms after dairy ingestion
03

In context

Lactose Intolerance

53 studies on the registry are indexed under Lactose Intolerance; 6 are open to participants now.

This study's enrollment of 61 is above the median of 41 across 41 interventional studies indexed under Lactose Intolerance.

Browse Lactose Intolerance studies →

Lead sponsor

Ritter Pharmaceuticals, Inc. is the lead sponsor of 4 studies on the registry; none are open to participants now.

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

04

Who can participate

Ages eligible
18 Years to 64 Years
Sexes eligible
All
Accepts healthy volunteers
No

Go through the criteria one by one — yes, no or not sure — and take the list to your doctor or the study team. Kept in this browser only.

Inclusion criteria

  • Male and female subjects. Female subjects must be non-pregnant and non-lactating.
  • 18 to 64 years of age inclusive at Screening
  • Current or recent history of intolerance to milk and other dairy products
  • Acceptable Baseline Lactose Intolerance Symptom Scores
  • Acceptable Result on Baseline Hydrogen Breath Test
  • Subjects must agree to refrain from all other treatments and products used for lactose intolerance during the study

Exclusion criteria

Exclusion Criteria:

  • Disorders known to be associated with abnormal GI motility
  • History of surgery that alters the normal function of the gastrointestinal tract
  • Past or present; organ transplant, chronic pancreatitis, pancreatic insufficiency, symptomatic biliary disease, Celiac disease, inflammatory bowel disease (IBD), ulcerative colitis, Crohn's disease, irritable bowel syndrome (IBS)
  • Active gastric or duodenal ulcers or history of severe ulcers
  • Diabetes mellitus (type 1 or type 2)
  • Congestive Heart Failure
  • History of (HIV), or C
  • Use of concurrent therapy(ies) for symptoms of lactose intolerance
  • Uncontrolled BP defined as sitting systolic blood pressure (SBP) ≥160 mmHg or diastolic blood pressure (DBP) ≥95 mmHg at Visit 1
  • History of ethanol abuse in the past 12 months
  • History of drug abuse within 12 months
  • History or presence of within the past 5 years (except basal cell or squamous cell carcinoma removed from a sun-exposed area)
  • Use of any drug or participation in any investigational study within 30 days prior to Screening
Terms in these criteria, in plain language(4)

Underlined terms in the criteria open these too. Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.

HIV

The human immunodeficiency virus, which weakens the immune system.

Many studies now accept people whose HIV is controlled on treatment, judged by the viral load and the CD4 count. Check the limits this study sets.

Hepatitis B tests

Hepatitis B is a virus that infects the liver. These are separate tests: HBsAg positive usually means a current infection (a recent vaccination can briefly cause it too); total anti-HBc (HBcAb) positive means an infection now or in the past; HBV DNA measures how much virus is in the blood.

Some studies accept a past infection if HBV DNA is undetectable, sometimes with antiviral medicine during the study. Check what this study allows.

Cancer (malignancy)

Malignancy means cancer. Criteria about another or earlier malignancy ask whether you have had a different cancer, usually within a set number of years.

Some are commonly allowed, such as treated skin cancers other than melanoma and early cancers removed completely — check the exceptions this study lists.

Investigational drug or device

A drug or device being studied in a clinical trial.

It may be new, or already approved and being studied for another use, dose or form. Criteria often leave out people who took part in another study of one within a recent period, commonly 30 days or five half-lives.

05

Study design

Phase
Phase 2
Primary purpose
Treatment
Allocation
Randomized
Intervention model
Parallel assignment
Masking
Triple (Participant, Investigator, Outcomes assessor)
Enrollment
61 participants (actual)

Study arms

  • Experimental
    RP-G28

    Study Drug RP-G28

    Drug: RP-G28 or placebo

  • Placebo comparator
    Placebo

    Study Drug Placebo

    Drug: RP-G28 or placebo

Interventions

  • DrugRP-G28 or placebo

    Qualified subjects randomized to daily dosing with RP-G28 or placebo

  • DrugRP-G28 or placebo

    Daily dosing

06

What researchers measure

Primary outcomes

  1. 1) Change from Baseline in breath hydrogen production on Hydrogen Breath Test. 2) Change from Baseline in lactose intolerance symptom assessment during lactose challenge

    Time frame: Baseline, 36 days

Secondary outcomes

  1. Number of Subjects with Adverse Events as Measure of Safety and Tolerability

    Number of Subjects with Adverse Events as a Measure of Safety and Tolerability

    Time frame: 36 days

07

Study locations

2 sites
  • Covance, Inc. - Honolulu
    Honolulu, Hawaii 96813, United States
  • Covance, Inc. - Dallas
    Dallas, Texas 75247, United States
08

References and documents

Publications

  • Savaiano DA, Ritter AJ, Klaenhammer TR, James GM, Longcore AT, Chandler JR, Walker WA, Foyt HL. Improving lactose digestion and symptoms of lactose intolerance with a novel galacto-oligosaccharide (RP-G28): a randomized, double-blind clinical trial. Nutr J. 2013 Dec 13;12:160. doi: 10.1186/1475-2891-12-160. PubMed 24330605 ↗
09

Timeline

Tracking since Sep 25, 2026
Not marked actual or estimatedDates not marked actual or estimated

The record gives a start of Apr 2011, a primary completion of Oct 2011 and a completion of Dec 2011. It does not say whether these dates are actual or estimated.

How these figures are worked out, and which studies are left out of them.

Registered
Apr 23, 2010
First posted
Apr 30, 2010
Start
Apr 2011
Primary completionActual
Oct 2011
CompletionActual
Dec 2011
Last update
Dec 8, 2011
What these dates mean
Start.
When the first participant enrolled; while estimated, when the study expects to open to recruitment.
Primary completion.
When the last participant was examined or treated to collect data for the study's main question, its primary outcome. A study that stopped early gives the date its data collection stopped.
Completion.
When the last participant's last visit took place, for every outcome, secondary ones and side effects included: the end of the study. Often later than primary completion, sometimes the same day.
Actual and Est.
Actual means the registry says the date has happened. Est. (estimated) is a date the sponsor plans or expects. It can still move, and the sponsor is expected to change it to actual once it has passed.
No changes since tracking began. The registry record was last updated on Dec 8, 2011, before this site started recording changes on Sep 25, 2026. Its history is on ClinicalTrials.gov ↗
10

Registry details

Key details

Study ID
NCT01113619
Lead sponsor
Ritter Pharmaceuticals, Inc.
Responsible party
Sponsor
First posted
Apr 30, 2010
Start date
Apr 2011
Primary completion
Oct 2011
Completion
Dec 2011
Last update
Dec 8, 2011

Oversight

Data monitoring committee
No
View the source record on ClinicalTrials.gov ↗

Not currently enrolling

This study is completed, as verified in Dec 2011. You cannot join it, but the record below documents what was studied.

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