AIDS Treatment News - Issue Number 377, January 25, 2002
John S. James
New interactions involving antiretrovirals and other drugs often used by persons with HIV -- or interactions with nutritional supplements, like garlic or St. John's wort -- keep being discovered; clearly many others are unknown. Usually one drug (or supplement) either raises or lowers the blood level of another drug -- sometimes by several fold. Raised levels can result in serious side effects; lowered levels may cause the drug not to work as intended, or allow HIV to develop resistance. Sometimes it is possible to compensate for these interactions by changing the dose of one or more drugs.
Since the list of known interactions keeps changing (several were reported at the recent ICAAC conference, for example), the best way to present the information is probably Web sites that allow anyone to type in a list of drugs they are taking or planning to take, and receive a report of any known interactions. There have been such sites for several years. As a community, we need to keep informed about what's best and most current, and encourage physicians and patients to check for known interactions when they change medications -- or if they use certain nutritional supplements.
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