Garlic, in raw and processed forms, interacts with protease inhibitors and may interact with some other prescription drugs. This interaction can significantly impact your health by increasing side effects. It also can weaken the effectiveness of HIV medications, leading to treatment failure, drug resistance, and reduced options for future treatment. If you want to use garlic as a medicinal herb, it is very important that you discuss this with all of your health care providers, including your doctor, pharmacist and natural health practitioner. A few cloves of cooked garlic, used as a flavouring in foods, is not expected to cause interactions.
Fresh garlic is most potent when eaten raw and is also cheap and widely available. Garlic is also available in capsules and as an aged extract . If you don't like its smell, you can use no- or low - odour capsules.
Garlic may irritate the digestive tract and cause stomach upset, particularly when taken in high doses or on an empty stomach. There is reason to believe that it may also be dangerous for those with low platelets, such as hemophiliacs, and for others who experience nose bleeds or heavy menstrual bleeding. The reason is that it can break up blood clots and prevent platelet clumping in people with certain forms of heart disease.