antibiotics and the pill-apparently some sort of controversy

I'm sure that many women have heard a million times from doctors and pharmacists that when they take antibiotics, they need a second form of birth control for like two years afterwards (well they don't say that long, maybe a month after). The planned parenthood website has something else to say (plannedparenthood.org/sexual-health/ask-dr-cullins/ask-dr-cullins-birth-control-5444.htm):

"Ask Dr. Cullins: Birth Control

Q: Does taking antibiotics make the pill less effective?


A: Only one antibiotic is known to make the pill less effective. That is rifampin, a special medication used to treat tuberculosis. The brand names include Rifadin and Rimactane. Other antibiotics do not make the pill less effective.
Certain other medicines may make the pill less effective. These include

certain anti-HIV protease inhibitors
certain anti-seizure medications
a particular anti-fungal medication, griseofulvin (Fulvicin, Gris-PEG, Grifulvin V, Grisactin, and Gristatin), which is used to treat severe, often life-threatening fungal infections

It is always wise to know how other medications may interact with the pill. Some medications may be less effective when used with the pill. These include

analgesics — for example, acetaminophen (Pamprin, Tylenol, Parcetamol, aspirin-free Excedrin, and others)
antihypertensives — for example, cyclopenthiazide (Prothiazide)

The effects of some medications may be exaggerated when used with the pill. These include

antidepressants — for example, imipramine (Janimine and Tofranil)
bronchodilators — for example, theophyline (Primatene, Theo-Dur, Marax, Bronkotabs, Quibron Tedra, and others)
tranquilizers — for example, benzodiazepam (Valium, Ativan, Librium, Serax, Tranxene, Xanax, and others)"

There's about three paragraphs worth of all the amazing doctor crap Dr. Cullins has done on the site if you want to read it.

Anyway, it makes me so angry to hear this conflicting information about something so important. I've asked doctors about this before, and I get the impression that they have to say it as some sort of legal protection and you also see that on the planned parenthood site. Until today, I hadn't met one doctor or pharmacist who could tell me about someone actually getting pregnant while using antibiotics and the pill. My doctor, who really is a bit nutty by all accounts, said that she got pregnant under those circumstances. It annoyed me to no end, as she usually does. I wasn't about to ask her the questions necessary to show that she probably had human error involved. She had probably just gone back on them or something after having a kid. Health professionals-please make a decision about this! I don't get the feeling that f'in planned parenthood is in the habit of just saying things that may or may not be true. They want to PREVENT unwanted pregnancy, so I get the feeling if there was a shadow of a doubt that they would say it! ARGH!