Drug Interaction Guide

Drug Interaction GuideSurprisingly, some everyday substances, like a glass of milk or a vitamin supplement, can render certain drugs ineffective or even harmful. Remember to ask your doctor or pharmacist about any medications you are taking and use the following drug interaction mini guide for your reference.

St. John’s Wort and Birth Control pills The herb St. John’s Wort, as well as certain antibiotics like doxycycline, may stimulate enzymes in the liver to metabolize oral contraception more quickly, lowering the amount of it in your bloodstream.

Dairy products and antibiotics The calcium in dairy, in addition to minerals found in multivitamins like zinc, aluminum, and magnesium, can bind to prescription antibiotics such as ciprofloxacin and block their absorption in the body.

Ginkgo Biloba and aspirin Both the herb and nonsteroidal anti-inflammatory drugs like aspirin have blood-thinning properties. Taking high doses of each simultaneously may lead to intestinal bleeding. [source: Shape]

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