<s>[INST] my girlfriend used amoxicillin 500mg the same day we had sex, i want to know the chances of her getting pregnant even when it was her day of ovulating. Its 3weeks now and she used the amoxicillin a few days after also. what are her chances of being pregnant? [/INST] Dear member,Thanks for writing to healthcare magic.The chances of pregnancy are not affected with amoxicillin as its an antibiotic.Thanks.Dr Bhagyashree. </s>