The Effect of Antacids and Multivitamins on Raltegravir
The Effect of Antacids and Multivitamins on Raltegravir
This study seeks to address the question of whether antacids or multivitamins influence the
 pharmacokinetics of raltegravir when co-administered. The aim of this study is to optimise
 the dosing of raltegravir when co-administered with antacids or multivitamins.
Inclusion Criteria:

 -  The ability to understand and sign a written informed consent form, prior to
 participation in any screening procedures and must be willing to comply with all study
 requirements.

 -  ≥ 18 years

 -  Male or female subjects

 -  A female may be eligible to enter and participate in the study if she:

 -  Is of non-child-bearing potential defined as ether post-menopausal (12 months of
 spontaneous amenorrhea and ≥ 45 years of age)or physically incapable of becoming
 pregnant with documented tubal ligation, hysterectomy or bilateral oophorectomy or

 -  Is of child-bearing potential with a negative pregnancy test at screening and agrees
 to use one of the following methods of contraception to avoid pregnancy

 -  Complete abstinence from intercourse from 2 weeks prior to administration of IP,
 throughout the study and for at least 4 weeks after discontinuation of all study
 medication

 -  Double barrier method (male condom/spermicide, male condom/diaphragm,
 diaphragm/spermicide)

 -  Any intrauterine device (IUD) with published data showing that the expected failure
 rate is < 1 % per year

 -  Any other method with published data showing that the expected failure rate is < 1 %
 per year

 -  Hormonal contraception plus a barrier method. Hormonal contraception alone will not be
 considered adequate for inclusion into or participation in this study

 -  Male subjects with a female partner of childbearing potential must agree to use
 effective contraception as above unless vasectomized

 -  All subjects participating in the study will be counseled on safer sexual practices
 including the use of effective barrier methods (e.g. male condom)

 Exclusion Criteria:

 -  Any significant acute or chronic medical condition

 -  Pregnant or lactating women

 -  Women of childbearing age unless using non hormonal contraception

 -  Evidence of organ dysfunction or any clinically significant deviation from normal
 during screening including laboratory determinations

 -  Abnormal LFTs (ALT > 2.5 x ULN, bilirubin > 1.5 x ULN)

 -  Positive blood screen for HIV-1 and 2 antibodies

 -  Positive blood screen for hepatitis B or C antibodies

 -  Current or recent (within 3 months) gastrointestinal disease

 -  Clinically relevant alcohol or drug use or history of alcohol or drug use that will
 hinder compliance with treatment, follow up procedures or evaluation of adverse
 effects

 -  Use of proton pump inhibitors

 -  Exposure to any investigational drug or placebo within 4 weeks of first dose of study
 drug

 -  Consumption of grapefruit and oranges or products containing grapefruit or oranges
 within 1 week of first study drug and for the duration of the study

 -  Use of any other drugs including over-the-counter medications and herbal preparations,
 within 2 weeks prior to first dose of study drug

 -  Previous allergy to any of the constituents of the pharmaceuticals in this trial