Quote from moodygirl87:

I have heard that many things can interfere with birth control and I was wondering what really does interfere with birth control. My gynocologist said that only two antibiotics will interfere with birth control and they are extremely strong, so I was wondering if anyone knew of anything else that could interfere. I just want to make sure I'm protected because I take a few other pills like ibuprofen and AZO and I want to take vitamins but I don't want them to interfere.

Ibuprofen and AZO should not interact with the birth control pill. You're safe in taking a general multi-vitamin, too.

The following drugs may decrease pill effectiveness. Of course, this is not a complete list, nor is every drug in every drug class thought to decrease pill effectivess:

Antibiotics (rifampin definately does)
Antifungals (griseofulvin)
Anticonvulsants (Example: Dilantin, Tegretol, Trileptal, Topamax, Mysoline)
Barbiturates (Examples- Amytal and phenobarbital)
HIV-fighting drugs (Ritonavir)
Nacrolepsy meds (Provigil)
St. John's Wort

Conversely, birth control pills may decrease the effectiveness of some other drugs, although the pill itself is not affected:

Aspirin products
Antivirals (Agenerase)

Also, birth control pills may increase the effectiveness of the following medications, and dosages should be adjusted:

Benzodiazepines (Valium, Xanax, Ativan)
Beta-Blockers (Inderal)
Corticosteroids (prednisone)
Theophylline
Tricyclic Antidepressants (Elavil, Pamelor)