How much do medications effect the pill?

My wife is on antibiotics for a sinus cold. She noticed the warning that this medication can affect the birth control pill. The pill is the only form of BC we use. We're having fun risking pregnancy, but we are wondering how much of a risk we are taking?

I'll tell you this, I have heard of one Dentist who was sued for failing to warn his female patient, about the antibiotic he prescribed, its effect of bc pills and had a judgement made against him given her unwanted pregnancy.

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London Couple
now that'd be fun to use....

My friend got knocked up twice becuz of antibiotics...once on the pill and once on the patch...now shes on the shot so she can fuck all she wants and not worry...