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A 24-year-old female asked:

Can plan b loose its effectiveness? i understand this might be circumstantial i.e. twice in one month, four times in six months, ect..

1 doctor answer1 doctor weighed in
Dr. Vahe Yetimyan
General Practice 53 years experience
It would not: loose it's effectiveness . Follow the instruction on the box of the medication.
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Last updated Jun 3, 2015

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