Is there any oral contraception that is affected by antibiotics?

Yes. This is an answer that is absolutely determined by the age and experience of the doctor answering the question! all of us were taught years ago that all birth control pills were less effective with antibiotics, and we warned patients to use a back-up method; 25 years of real world experience has shown me that it has never happened! now we have new lo-lo pills, the dose is so low that it could!