 [ Symptoms ] is it safe to take cefdinir antibiotic and microgestin birth control together  i recently got diagnosed with tonsillitis for the second time and was prescribed cefdinir as my antibiotic but i am also on bcp i know that antibiotics can reduce the efficacy of bcp but are there any other health effects i should know of [ Disease ] birth control pills are not 100 but they close using a condom will increase the effectiveness for sure but it is a bit too late to worry about that now i suspect your girlfriend is not pregnant which is probably good since her sexual partner you should have been more considerate and caring you do not get pregnant my friend but your girlfriend can so let this be a learning experience for you use condoms or postpone sexual activity until you are more responsible maybe you want to be a dad i do not know signed dad not your dad but a dad