COVID-19 is an emerging, rapidly evolving situation.
Get the latest public health information from CDC:

Get the latest research information from NIH: Menu

TMC278-TiDP6-C154: Evaluation of the Possible Influence of Omeprazole Intake - and the pH Increase in the Stomach Triggered by Omeprazole Intake - on the Blood Levels of TMC278 in Healthy Volunteers

The safety and scientific validity of this study is the responsibility of the study sponsor and investigators. Listing a study does not mean it has been evaluated by the U.S. Federal Government. Read our disclaimer for details. Identifier: NCT01001247
Recruitment Status : Completed
First Posted : October 26, 2009
Last Update Posted : July 9, 2010
Information provided by:
Tibotec Pharmaceuticals, Ireland

Brief Summary:
The purpose of this study is to investigate the extent by which intake of 20 mg once daily (q.d.) omeprazole influences the levels of TMC278 in the blood after intake of 25 mg q.d.. This study also investigates - in case levels of TMC278 are reduced when co-administered with omeprazole - whether a double dose of TMC278 (50 mg q.d.) or a separation of intake of both drugs by 12 hours may circumvent a decrease of TMC278 levels in the blood below the clinical effective concentration. Omeprazole is prescribed to reduce the production of gastric acid. Since TMC278 requires gastric acid to be properly dissolved and taken up in the blood circulation, intake of omeprazole has an influence on the levels of TMC278 in the blood circulation. This effect has been revealed in a previously conducted clinical trial, using the combination of 150 mg TMC278 q.d. and 20 mg q.d. omeprazole. The currently proposed study will also further explore the relationship between the levels of TMC278 in the blood at several time points and the acidity of the stomach. Also the short-term safety and tolerability of co-administration of omeprazole 20 mg q.d. and TMC278 25 mg q.d. will be assessed.

Condition or disease Intervention/treatment Phase
HIV Infections Drug: TMC278; Omeprazole Phase 1

Detailed Description:
This is an open label study, which means that all parties including the study doctor, the healthy volunteer and the sponsor plus his designees will know at all times which treatment the volunteer is in. This is a 4-way cross over trial, which means that every volunteer will be sequentially subjected to 4 different treatments.There are 4 treatment sequences defined: ABCD, BDAC, CADB and DCBA. Treatment sessions are organized in such a way that between successive intakes of TMC278 a period of 14 days is respected. Treatment A is the reference, showing the levels of TMC278 in blood without any intake of omeprazole. These data points will be compared with blood levels of TMC278 when TMC278 is being administered 1.5 hours after intake of omeprazole (Treatment B) or with blood levels of TMC278 when being administered 12 hours after intake of omeprazole (Treatment C). Treatment B will be the comparator of Treatment D, in order to reveal whether doubling the dose of TMC278 (50 mg q.d. used in Treatment D) can circumvent the reduction of TMC278 levels when being co-administered with omeprazole, if applicable. In each session, an extensive investigation of the levels of TMC278 in the blood circulation is planned. Levels of TMC278 will be assessed at 16 different time points, i.e. before administration of TMC278, 0.5, 1, 2, 3, 4, 5, 6, 9, 12, 16, 24, 48, 72, 120 and 168 hours after intake of TMC278. During all treatments, the acidity in the stomach (called intragastric pH) will be monitored during a 24-hour period on the day of TMC278 intake. Standard Safety assessments (blood biochemistry and haematology, urine analysis, ECG, pulse rate and blood pressure) will be performed on Day1, 2 and 8 in Treatment A and on Day-5, 1, 2, 8 in Treatment B, C and D. Treatment A: 25mg TMC278 in the morning of Day1; Treatment B: 25mg TMC278 in the morning of Day1 and 20mg omeprazole in the morning from Day-5 through Day2 (7 days in total); Treatment C: same as treatment B, but omeprazole is taken in the evening; Treatment D: same as treatment B, but 50mg omeprazole is taken instead of 25mg. All intakes are oral. In Treatment B, C and D, the intake of omeprazole is witnessed by site staff on Days -5, -3, -2 and -1

Layout table for study information
Study Type : Interventional  (Clinical Trial)
Actual Enrollment : 18 participants
Allocation: Randomized
Intervention Model: Crossover Assignment
Masking: None (Open Label)
Primary Purpose: Treatment
Official Title: A Phase I, Open Label, Randomized, 4-way Crossover Trial to Evaluate the Pharmacokinetics of TMC278 25mg and 50mg in the Presence of Omeprazole 20mg q.d., in Healthy Subjects
Study Start Date : January 2010
Actual Primary Completion Date : April 2010
Actual Study Completion Date : April 2010

Resource links provided by the National Library of Medicine

MedlinePlus related topics: HIV/AIDS

Primary Outcome Measures :
  1. Plasma levels of TMC278 assessed after co-administration of 20mg q.d. omeprazole taken either in the morning (1.5 h before TMC278) or in the evening (12 h before TMC278); assess 24h intragastric pH at days of intake of TMC278 [ Time Frame: Plasma levels: Treatment A, B, C and D: Day1 (at 11 time points), Day2, 3, 4, 6 and 8 (all at 1 time point). Intragastric pH: Treatment A, B, C and D at Day1 (=day of intake TMC278). ]

Secondary Outcome Measures :
  1. To evaluate the short-term safety and tolerability of co-administration of omeprazole with a single 25mg and 50mg dose of TMC278 [ Time Frame: 13 weeks (this includes a treatment, washout and follow up period and is excluding screening period of maximum 21 days before first medication intake) ]

Information from the National Library of Medicine

Choosing to participate in a study is an important personal decision. Talk with your doctor and family members or friends about deciding to join a study. To learn more about this study, you or your doctor may contact the study research staff using the contacts provided below. For general information, Learn About Clinical Studies.

Layout table for eligibility information
Ages Eligible for Study:   18 Years to 55 Years   (Adult)
Sexes Eligible for Study:   All
Accepts Healthy Volunteers:   Yes

Inclusion Criteria:

  • Smoking no more than 10 cigarettes, or 2 cigars, or 2 pipes per day (or non-smoking) for at least 3 months prior to selection
  • Weight as defined by a Body Mass Index (BMI, weight in kg divided by the square of height in meters) of 18.0 to 30.0 kg/m2, extremes included
  • Informed Consent Form (ICF) signed voluntarily
  • Able to comply with protocol requirements
  • Healthy on the basis of a pretrial physical examination, medical history, the results of blood biochemistry and hematology tests, a urinalysis, vital signs, and a 12-lead electrocardiogram (ECG)

Exclusion Criteria:

  • No positive testing for HIV-1 or -2
  • females, except if menopausal for at least 2 years, or with total hysterectomy or bilateral tubal ligation (without repair surgery)
  • No infection of Hepatitis A, B or C
  • No currently active gastrointestinal, cardiovascular, neurologic, psychiatric, metabolic, renal, hepatic, respiratory, inflammatory or infectious disease
  • No history of clinically relevant heart rhythm disturbances
  • No positive urine drug testing

Information from the National Library of Medicine

To learn more about this study, you or your doctor may contact the study research staff using the contact information provided by the sponsor.

Please refer to this study by its identifier (NCT number): NCT01001247

Sponsors and Collaborators
Tibotec Pharmaceuticals, Ireland
Layout table for investigator information
Study Director: Tibotec Pharmaceuticals Clinical Trial Tibotec Pharmaceutical Limited
Layout table for additonal information
Responsible Party: Compound Development Team Leader, Tibotec Pharmaceuticals, Ireland Identifier: NCT01001247    
Other Study ID Numbers: CR016267
First Posted: October 26, 2009    Key Record Dates
Last Update Posted: July 9, 2010
Last Verified: July 2010
Keywords provided by Tibotec Pharmaceuticals, Ireland:
Healthy volunteers
proton pump inhibitor
Additional relevant MeSH terms:
Layout table for MeSH terms
HIV Infections
Lentivirus Infections
Retroviridae Infections
RNA Virus Infections
Virus Diseases
Sexually Transmitted Diseases, Viral
Sexually Transmitted Diseases
Immunologic Deficiency Syndromes
Immune System Diseases
Anti-Ulcer Agents
Gastrointestinal Agents
Proton Pump Inhibitors
Enzyme Inhibitors
Molecular Mechanisms of Pharmacological Action
Reverse Transcriptase Inhibitors
Nucleic Acid Synthesis Inhibitors
Anti-Retroviral Agents
Antiviral Agents
Anti-Infective Agents
Anti-HIV Agents