Depends on med: Some antibiotics can lower plan B effectiveness, they are ampicillin, cotrimoxazole (in Bactrim), tetracycline, & clarithromycin. Be sure to check brand and generic names if you think you might be taking one of these. Happy to answer more specific knowing the medication for uti.
Answered 6/18/2017
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Yes: However, as Dr. Love said, certain antibiotics may impact it's level of effectiveness.
Answered 6/18/2017
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