Could a simple antacid sabotage HIV treatment?

Copied word for word from the study's registry entry, so the wording is the study team's rather than ours.

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