Skip to main content
OpenTrials
Completed

NCT Number: NCT02473367

The Effect of Antacids on the Pharmacokinetics (PK) of Raltegravir in Human Immunodeficiency Virus (HIV)-Infected Participants (MK-0518-824)

In order to define the safe windows for co-dosing of metal-cation antacids with once daily administered raltegravir, this study will evaluate the effect of both calcium carbonate and magnesium/aluminum hydroxide antacids on the pharmacokinetics of raltegravir, due to dosage of 1200 mg raltegravir in HIV-infected participants already taking 400 mg raltegravir twice daily as part of their HIV treatment regimen.

Completed

Looking for future studies?

Notify Me

Key information

Conditions

HIV Infection Blood-Borne Infections Communicable Diseases Genital Diseases HIV Infections Immune System Diseases Immunologic Deficiency Syndromes Infections Lentivirus Infections RNA Virus Infections Retroviridae Infections Sexually Transmitted Diseases Sexually Transmitted Diseases, Viral Urogenital Diseases Virus Diseases

Age range

18 year and older

Sex eligibility

All sexes

Study type

Interventional

Phase

Phase 1

Who can participate

Healthy volunteers accepted: No

Only the study team can determine whether someone qualifies for participation.

Inclusion criteria

  • Is HIV positive
  • Is on a stable raltegravir-containing (400 mg every 12hr) antiretroviral (ARV) regimen for at least 1 month prior to study entry, with no changes, including dose adjustments; and agrees to maintain their current ARV therapy throughout the study.
  • Be male, or a non-pregnant and non-breast feeding female at least 18 years of age at the pre-trial (screening)
  • Has a Body Mass Index (BMI) =< 32 kg/m^2

Exclusion criteria

  • Has a history of clinically significant endocrine, gastrointestinal, cardiovascular, hematological, hepatic, immunological, renal, respiratory, genitourinary or major neurological (including stroke and chronic seizures) abnormalities or diseases (excluding HIV)
  • Has a history of gastric bypass surgery
  • Has a history of cancer (malignancy)
  • Has a history of chronic diarrhea within approximately 3 months prior to the pre-trial visit
  • Has a history of significant multiple and/or severe allergies (e.g. food, drug, latex allergy), or has had an anaphylactic reaction or significant intolerability to prescription or non-prescription drugs or food
  • Has had major surgery, donated or lost 1 unit of blood (approximately 500 mL) within 4 weeks prior to the pre-trial visit
  • Has participated in another investigational trial within 4 weeks prior to the pre-trial visit
  • Is currently taking rifampin or atazanavir or is unable to refrain from the use of 1) any proton pump inhibitor from two weeks prior to the study through the completion of Period 4, and 2) any H2-blockers, over-the-counter antacids, calcium supplements or multivitamins from one week prior to the study through the completion of Period 4
  • Consumes greater than 3 glasses of alcoholic beverages or distilled spirits per day
  • Consumes greater than 6 servings of coffee, tea, cola, energy-drinks, or other caffeinated beverages per day
  • Is currently a regular user (including "recreational use") of any illicit drugs or has a history of drug (including alcohol) abuse within approximately 6 months of screening

Treatment and study plan

Raltegravir 1200 mg

Drug

Two tablets of 600 mg raltegravir administered orally, once daily, over 5 days of Pre-treatment, and once at the start of Periods 1-4.

TUMS

Drug

Three tablets of TUMS Ultra Strength (US) 1000, taken orally, concomitantly with raltegravir in Period 2, and 12 hours after raltegravir in Period 4

Leader Antacid

Drug

20 mL Leader Antacid Maximum Strength (MS) taken orally 12 hours after raltegravir, in Period 3

Primary outcomes

  1. Area Under the Plasma Concentration Time Curve From Time 0 to 24 Hrs (AUC 0-24hr) of Raltegravir Following Once Daily Administration of Raltegravir

    Time frame: Predose, 0.5, 1, 1.5, 2, 3, 4, 6, 8, 12, 16 and 24 hours post-dose

    In Period 1 participants were treated with 1200 mg raltegravir alone; followed by Period 2 where participants were treated with 1200 mg raltegravir and three tablets of TUMS Ultra Strength (US) 1000 taken orally concomitantly; followed by Period 3 where participants were treated with 1200 mg raltegravir and 12 hours later with 20 mL Leader Antacid Maximum Strength (MS) taken orally; followed by Period 4 where participants were treated with 1200 mg raltegravir and 12 hours later with three tablets of TUMS US 1000 taken orally. The wait between Periods was a maximum of 7 days, during which participants were treated with 1200 mg raltegravir once daily. To determine the plasma concentration of raltegravir, blood samples were collected from pre-dose up to 24 hours post-dose, and analysis of variance (ANOVA) modeling was performed on natural log-transformed values to derive geometric least-squares means.

  2. Maximum Plasma Concentration (Cmax) of Raltegravir Following Once Daily Administration of Raltegravir

    Time frame: Predose, 0.5, 1, 1.5, 2, 3, 4, 6, 8, 12, 16 and 24 hours post-dose

    In Period 1 participants were treated with 1200 mg raltegravir alone; followed by Period 2 where participants were treated with 1200 mg raltegravir and three tablets of TUMS US 1000 taken orally concomitantly; followed by Period 3 where participants were treated with 1200 mg raltegravir and 12 hours later with 20 mL Leader Antacid MS taken orally; followed by Period 4 where participants were treated with 1200 mg raltegravir and 12 hours later with three tablets of TUMS US 1000 taken orally. The wait between Periods was a maximum of 7 days, during which participants were treated with 1200 mg raltegravir once daily. To determine the plasma concentration of raltegravir, blood samples were collected from pre-dose up to 24 hours post-dose, and ANOVA modeling was performed on natural log-transformed values to derive geometric least-squares means.

  3. Plasma Concentration at 24 Hrs Post-dose (C24hr) of Raltegravir Following Once Daily Administration of Raltegravir

    Time frame: 24 hours post-dose

    In Period 1 participants were treated with 1200 mg raltegravir alone; followed by Period 2 where participants were treated with 1200 mg raltegravir and three tablets of TUMS US 1000 taken orally concomitantly; followed by Period 3 where participants were treated with 1200 mg raltegravir and 12 hours later with 20 mL Leader Antacid MS taken orally; followed by Period 4 where participants were treated with 1200 mg raltegravir and 12 hours later with three tablets of TUMS US 1000 taken orally. The wait between Periods was a maximum of 7 days, during which participants were treated with 1200 mg raltegravir once daily. To determine the plasma concentration of raltegravir, blood samples were collected at 24 hours post-dose, and ANOVA modeling was performed on natural log-transformed values to derive geometric least-squares means.

Sponsors and collaborators

Lead sponsor

Merck Sharp & Dohme LLC

Industry

Registry information

Official study title

A Study to Evaluate the Influence of Metal Cation-Containing Antacids on MK-0518 Pharmacokinetics in HIV-Infected Subjects on a Stable Raltegravir-Containing Regimen

Important dates

Study start
2015
Primary completion
2015
Study completion
2015
First posted
Jun 16, 2015
Registry last updated
Aug 27, 2018

OpenTrials presents study information sourced from ClinicalTrials.gov. The official registry record should be consulted for the latest information.

View the official ClinicalTrials.gov record (opens in a new tab)

This listing is for discovery and informational purposes only. It is not medical advice, does not guarantee that a study is recruiting, and does not determine eligibility. Contact the study team and a qualified healthcare professional when considering participation.

Related clinical trials

Published trials that share one or more normalized conditions with this study.