A Phase 1 interventional study of DW-1021 and Pelubi CR + Zytram CR in Healthy Volunteer, sponsored by Haiphong University of Medicine and Pharmacy. Recruiting at 2 sites in Vietnam. Open to male participants aged 18 Years to 45 Years, including healthy volunteers. Per ClinicalTrials.gov, last updated 2025-08-28.
Sponsored by Haiphong University of Medicine and Pharmacy · Phase 1, Interventional, and Treatment
This is a Phase 1, randomized, open-label, single-dose, two-period, cross-over study to evaluate the pharmacokinetics (PK) of DW-1021, a fixed-dose combination tablet containing Pelubiprofen 45 mg and Tramadol 45.9 mg (as a salt), in healthy adult Vietnamese male volunteers. The study compares DW-1021 with the co-administration of two reference drugs: Pelubi CR 45 mg (Pelubiprofen) and Zytram CR 75 mg (Tramadol HCl), under fasting conditions.
A total of 14 eligible participants will be randomly assigned to receive either the test drug followed by the reference drugs, or vice versa, with a 14-day washout period between the two dosing periods. Blood samples will be collected over a 48-hour period after each administration to evaluate drug concentrations. The main purpose is to assess and compare the rate and extent of absorption (Cmax, AUC) of the test and reference products.
The study is sponsored by Haiphong University of Medicine and Pharmacy in collaboration with Daewon Pharmaceutical Co., Ltd. It is conducted under ethical approval by the National Ethics Committee in Biomedical Research of Vietnam.
This clinical trial is designed to evaluate and compare the pharmacokinetic characteristics of DW-1021, a fixed-dose combination of Pelubiprofen and Tramadol in salt form (Pelubiprofen 45 mg - Tramadol 45.9 mg), with the co-administration of the individual components-Pelubi CR 45 mg (controlled release Pelubiprofen) and Zytram CR 75 mg (controlled release Tramadol hydrochloride)-in healthy adult male Vietnamese volunteers under fasting conditions.
This is an open-label, randomized, single-dose, two-treatment, two-period, two-sequence crossover study. Fourteen eligible participants will be randomized into two sequences: Test-Reference (TR) and Reference-Test (RT), with each dosing period separated by a 14-day washout. Study drugs will be administered in a fasted state, and blood samples will be collected at multiple time points up to 48 hours post-dose for pharmacokinetic analysis.
The primary PK parameters include Cmax and AUCt. Secondary PK parameters include Tmax, AUC∞, and t1/2. Safety will be monitored through assessment of adverse events, vital signs, clinical laboratory tests, and physical examinations throughout the study.
The trial is sponsored by Haiphong University of Medicine and Pharmacy. Analytical testing of plasma concentrations will be performed by Invites Bio-Core, and CRO support is provided by Big Leap Clinical Research Support JSC. The study is approved by the National Ethics Committee in Biomedical Research of Vietnam (Approval No. 277/CN-HĐĐĐ, dated 12/12/2024). This study was additionally approved for protocol amendments by the Vietnamese Ministry of Health under Decision No. 3840/QĐ-BYT, dated December 19, 2024.
Haiphong University of Medicine and Pharmacy is the lead sponsor of 10 studies on the registry; 6 are open to participants now.
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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.
Exclusion Criteria:
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.
Weight in kilograms divided by height in metres squared. Example: 70 kg and 1.75 m gives 70 ÷ (1.75 × 1.75) ≈ 22.9.
What counts as overweight or obesity differs between countries (some use lower cut-offs), so go by the range the study states.
Judged by the study doctor to matter for your health or for the study. It is a doctor’s decision, so ask the study team if you are unsure whether something counts.
Hepatitis C is a virus that infects the liver. An HCV antibody test can stay positive after an infection has cleared (and is occasionally positive without one); an HCV RNA test shows whether the virus is there now.
After treatment, hepatitis C counts as cured when HCV RNA is still undetectable 12 weeks or more after the treatment ended. Studies often accept people cured this way.
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.
A recording of the heart’s electrical activity, taken with stickers on the chest, arms and legs. It takes a few minutes and does not hurt.
Before you join, the study team explains what taking part involves — its purpose, what happens, the risks and possible benefits — and answers your questions, so you can decide freely. Consent is usually recorded on a form (the informed consent form, ICF) signed by you or, where the law allows, by someone legally authorised to decide for you.
You can keep asking questions during the study, you are told of new information that matters, and you can choose to leave at any time.
Ways of preventing pregnancy. “Highly effective” methods fail less than 1% of the time a year when used correctly — for example an IUD or an implant.
Criteria usually say which methods count and how long to keep using them after the last dose, sometimes for male participants too. Some studies accept a partner’s vasectomy if it was confirmed successful and that person is the participant’s only sexual partner.
An allergy, or another reaction of the immune system, to a substance. “Hypersensitivity to the study drug” means a known allergic reaction to it — not every side effect a medicine can have.
BMI (body mass index)
Weight in kilograms divided by height in metres squared. Example: 70 kg and 1.75 m gives 70 ÷ (1.75 × 1.75) ≈ 22.9.
What counts as overweight or obesity differs between countries (some use lower cut-offs), so go by the range the study states.
Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
Clinically significant
Judged by the study doctor to matter for your health or for the study. It is a doctor’s decision, so ask the study team if you are unsure whether something counts.
Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
Hepatitis C tests
Hepatitis C is a virus that infects the liver. An HCV antibody test can stay positive after an infection has cleared (and is occasionally positive without one); an HCV RNA test shows whether the virus is there now.
After treatment, hepatitis C counts as cured when HCV RNA is still undetectable 12 weeks or more after the treatment ended. Studies often accept people cured this way.
Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
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.
Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
ECG (electrocardiogram)
A recording of the heart’s electrical activity, taken with stickers on the chest, arms and legs. It takes a few minutes and does not hurt.
Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
Informed consent
Before you join, the study team explains what taking part involves — its purpose, what happens, the risks and possible benefits — and answers your questions, so you can decide freely. Consent is usually recorded on a form (the informed consent form, ICF) signed by you or, where the law allows, by someone legally authorised to decide for you.
You can keep asking questions during the study, you are told of new information that matters, and you can choose to leave at any time.
Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
Contraception
Ways of preventing pregnancy. “Highly effective” methods fail less than 1% of the time a year when used correctly — for example an IUD or an implant.
Criteria usually say which methods count and how long to keep using them after the last dose, sometimes for male participants too. Some studies accept a partner’s vasectomy if it was confirmed successful and that person is the participant’s only sexual partner.
Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
Hypersensitivity
An allergy, or another reaction of the immune system, to a substance. “Hypersensitivity to the study drug” means a known allergic reaction to it — not every side effect a medicine can have.
Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
Participants in this arm will receive the test drug DW-1021 (Pelubiprofen 45 mg - Tramadol 45.9 mg salt) in Period I, followed by the reference drugs-Pelubi CR 45 mg and Zytram CR 75 mg-in Period II. A 14-day washout period separates the two dosing periods.
Drug: DW-1021 · Drug: Pelubi CR + Zytram CR
Participants in this arm will receive the reference drugs-Pelubi CR 45 mg and Zytram CR 75 mg-in Period I, followed by the test drug DW-1021 (Pelubiprofen 45 mg - Tramadol 45.9 mg salt) in Period II. A 14-day washout period separates the two dosing periods.
Drug: DW-1021 · Drug: Pelubi CR + Zytram CR
DW-1021 is a fixed-dose combination tablet containing Pelubiprofen 45 mg and Tramadol 45.9 mg (as a salt), formulated as a controlled-release film-coated tablet. It is administered as a single oral dose with 150 mL of water under fasting conditions for the evaluation of pharmacokinetics in healthy adult male volunteers.
Also known as: Pelubiprofen 45 mg - Tramadol 45.9 mg salt combination, Pelubiprofen-Tramadol fixed-dose combination
The reference treatment consists of two separate controlled-release film-coated tablets: Pelubi CR (Pelubiprofen 45 mg) and Zytram CR (Tramadol HCl 75 mg). These are co-administered as a single oral dose with 150 mL of water under fasting conditions to compare the pharmacokinetic profile against the fixed-dose combination DW-1021.
Also known as: Pelubiprofen 45 mg controlled-release tablet, Tramadol HCl 75 mg controlled-release tablet
Maximum plasma concentration (Cmax)
Cmax represents the peak plasma concentration of the drug after administration. It is used to compare the rate of absorption between the test and reference products.
Time frame: 0 to 48 hours post-dose in each period
Area under the plasma concentration-time curve from time 0 to the last measurable concentration (AUCt)
AUCt is a pharmacokinetic parameter representing the total drug exposure from administration to the last quantifiable time point. It is used to compare the extent of absorption between DW-1021 and the reference drugs.
Time frame: 0 to 48 hours post-dose in each period
Area under the curve extrapolated to infinity (AUC∞)
AUC∞ represents the total drug exposure over time, extrapolated beyond the last measured concentration. It helps assess complete systemic exposure.
Time frame: 0 to 48 hours post-dose in each period
Terminal elimination half-life (t1/2)
The time it takes for the plasma concentration of the drug to decrease by 50%. It is used to understand the drug elimination kinetics.
Time frame: 0 to 48 hours post-dose in each period
Time to reach maximum plasma concentration (Tmax)
Tmax is defined as the time point at which the maximum plasma drug concentration is observed following drug administration. It is used to compare the absorption rate between DW-1021 and the reference products.
Time frame: 0 to 48 hours post-dose in each period
Plan to share: No — Individual participant data (IPD) will not be shared due to privacy concerns and the limited scope of the Phase I pharmacokinetic study in healthy volunteers. The study does not include plans or infrastructure for external data sharing.
Start is estimated for Sep 2025; primary completion for Sep 2025, 0 months later.
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Haiphong University of Medicine and Pharmacy