Conditions: HIV Infections
Allocation: RANDOMIZED | Intervention model: CROSSOVER
Enrollment: 27
Healthy volunteers: no

Brief summary:
This study will evaluate: (1) the effect of co-administration of single doses of calcium carbonate antacid and magnesium/aluminum hydroxide antacid on the steady-state plasma pharmacokinetic profile of raltegravir in human immunodeficiency virus (HIV)-infected participants; and (2) the effect of staggered dosing of a single dose of a magnesium/aluminum hydroxide antacid 2 hours before and 2 hours after administration of raltegravir on the steady-state plasma pharmacokinetic profile of raltegravir in the same participants.

The study will determine whether (1) the C12hrs of steady-state raltegravir after co-administration of single doses of calcium carbonate antacid is decreased to a clinically meaningful degree compared with C12hrs after administration of raltegravir alone; and whether (2) the C12hrs of steady-state raltegravir after co-administration of a single dose of magnesium/aluminum hydroxide antacid is decreased to a clinically meaningful degree compared with the C12hrs after administration of raltegravir alone.

Detailed description:

Arms:
arm 1: Participants received Raltegravir in treatment period 1, followed by TUMS® + Raltegravir in treatment period 2, followed by MINTOX® + Raltegravir in treatment period 3, followed by MINTOX® 2 hours before Raltegravir in treatment period 4, followed by MINTOX® 2 hours After Raltegravir in treatment period 5. There was a 2-day washout between treatment periods. arm 2: Participants received TUMS® + Raltegravir in treatment period 1, followed by MINTOX® + Raltegravir in treatment period 2, followed by Raltegravir in treatment period 3, followed by MINTOX® 2 hours before Raltegravir in treatment period 4, followed by MINTOX® 2 hours after Raltegravir in treatment period 5. There was a minimum 2-day washout between treatment periods. arm 3: Participants received MINTOX® + Raltegravir in treatment period 1, followed by Raltegravir in treatment period 2, followed by TUMS® + Raltegravir in treatment period 3, followed by MINTOX® 2 hours before Raltegravir in treatment period 4, followed by MINTOX® 2 hours after Raltegravir in treatment period 5. There was a minimum 2-day washout between treatment periods. arm 4: Participants received Raltegravir in treatment period 1, followed by MINTOX® + Raltegravir in treatment period 2, followed by TUMS® + Raltegravir in treatment period 3, followed by MINTOX® 2 hours after Raltegravir in treatment period 4, followed by MINTOX® 2 hours before Raltegravir in treatment period 5. There was a minimum 2-day washout between treatment periods. arm 5: Participants received TUMS® + Raltegravir in treatment period 1, followed by Raltegravir in treatment period 2, followed by MINTOX® + Raltegravir in treatment period 3, followed by MINTOX® 2 hours after Raltegravir in treatment period 4, followed by MINTOX® 2 hours before Raltegravir in treatment period 5. There was a minimum 2-day washout between treatment periods. arm 6: Participants received MINTOX® + Raltegravir in treatment period 1, followed by TUMS® + Raltegravir in treatment period 2, followed by Raltegravir in treatment period 3, followed by MINTOX® 2 hours after Raltegravir in treatment period 4, followed by MINTOX® 2 hours before Raltegravir in treatment period 5. There was a minimum 2-day washout between treatment periods.

Interventions: intervention 1: Raltegravir intervention 2: TUMS® Ultra Strength intervention 3: MINTOX® Maximum Strength
Intervention descriptions: intervention 1: Raltegravir 400 mg oral tablet taken with 240 mL water every 12 hours

Throughout the study, participants will continue to take raltegravir along with their other HIV medications. On the day of co-dosing and intensive pharmacokinetic (PK) sampling, raltegravir will be dosed in the morning in a fasted state in all periods. intervention 2: 3 tablets TUMS® Ultra Strength (US) 1000 mg

Throughout the study, participants will continue to take raltegravir every 12 hours along with their other HIV medications. There will be a minimum of 2 days washout between treatment periods. On the day of co-dosing and intensive PK sampling, raltegravir will be dosed in the morning in a fasted state in all periods. intervention 3: 20 mL MINTOX® Maximum Strength (MS)

Throughout the study, participants will continue to take raltegravir every 12 hours along with their other HIV medications. There will be a minimum of 2 days washout between treatment periods. On the day of co-dosing and intensive PK sampling, raltegravir will be dosed in the morning in a fasted state in all periods.

Protocol document: