Conversation: The conversation between human and AI assistant.
[|Human|] Ok well im on the antibiotic keflex 500mg. I had unprotected sex today while i was taking the antibiotic...could i get pregnant?? Because im on birth control called micronor and i dont get my period because of it. So if i could het pregnant i wouldnt even no when to take a pregancy test
[|AI|]  Hi, There is no evidence that cephalexin will affect birth control pills. It is a common belief that all antibiotics interfere with the efficacy of birth control pills, though that is not always the case. Micronor is very effective in preventing pregnancy. It has just 0.5% failure rate if you have taken it regularly on specific time. So I think there is no chance of pregnancy. If you want to confirm, you can go blood Chat Doctor test 10 days after sexual intercourse or urine pregnancy test 3 weeks after your unprotected intercourse or 7 days after completing the micron or pack. Avoid stress, take healthy diet, Chat Doctor. Hope this may help you. Contact further if follow up needed. Best regards,