Does noroxin (norfloxacin) interfere with one's birth control pills?

Yes it can: Most antibotics adversely affecting oral contraceptive pills by altering the bacterial content of the intestinal tract which in turn affects the absorption/metabolism of the contraceptive pills. Injectables and transdermal form of the contraceptive medications are typically not affected by antibiotic use. So, double up protection if you must. Consult your doc. Good luck.