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A member asked:

If you were on penicillin(fri to mon) two pills every 6hrs and started your birth control that sunday should u use a second method for the entire mth?

A doctor has provided 1 answer
Dr. J Ricardo Loret De Mola answered

Specializes in Fertility Medicine

No: We do not recommend a backup method anymore when taking antibiotics, you should be fine.

Dr Boling agreed

Answered 3/26/2019

4.5k views

Thank
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Took 2 hpt 5 weeks after intercourse, both -ve. It is just by chance that my last period was abnormally light? Went off birth control 4 mons ago

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