Conversation: The conversation between human and AI assistant.
[|Human|] Hello, I am taking OrthoTricycline birth control pills. I have been prescribed the antibiotic Marcobid for a UTI . Is this one of the antibiotics that makes birth control less effective? Do you need a back-up method of birth control while taking it? If so, how long after you finishing using Macrobid do you continue needing a back-up method?
[|AI|]  Hi dear, and thanks for your query. In the past, women using hormonal contraception such as the pill or patch would be advised to use an extra method of contraception (e.g. condoms) while taking an antibiotic like this one and for seven days after finishing the course. However, this advice has now changed. You no longer need to use an extra method of contraception with the pill, patch or vaginal ring while you take a course of antibiotics. This change in advice comes because to date there is no evidence to prove that antibiotics (other than rifampicin or hifalutin) affect these contraceptives. All the best