A member asked:

Drugs or herbs that may decrease effectiveness of plan b?

A doctor has provided 1 answer
Dr. Samuel Galima answered

Specializes in Family Medicine

There is a long list of prescription medications that can decrease the serum concentration of hormonal contraceptives, in other words, decrease effectiveness. Herbal supplements are not FDA regulated and are difficult to discern which ones and which ingredients have adverse effects. Please be specific

Answered 3/7/2022

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