i agree, taking penicillan every day is not good for your body. I dont know what your doctors thinking but if you were to ask another two diferent dotors about this they would tell you to get off it. Its absurb. I've seen many excellent doctors with reputable practices, scholars who continue to publish as well, ad none have even mentioned penicillan. They have told me that yes, we are more prone to infection because the lip breaks open but no, it is not something to stress over, we were just predisposed to this disease and something triggered the outbreak in our lips whether it be lip licking, chemicals from chapstick or aftershave, cologne, etc... We al have different stories here but it is obvious there were triggers for all of us. I truly hope you see a different doctor because this doctor clearly doesnt know what they are doing nor do they care enough to research your issue because if they did they would realize they are wrong in prescribing you your drugs. The best thing to do it let time heal naturally..................