Amoxicillin and oral contraceptive pills

Patient: I am taking Amoxicillin for strep throat. I am wondering if I was to take birth control if it would even work? and also does smoking weed effect any of my medications. (I forgot to ask my dr)

Doctor: Amoxicillin can interfere with the functioning of the oral contraceptive pill and decrease its effectiveness. I would ad vise alternative contraceptive measures like condoms when on amoxicillin. Smoking marijuana while on a birth control pill is not recommended.Women who smoke tobacco or marijuana while on the pill are twenty times more likely to develop heart disease than non-smokers.