Oh my god I’ve got so many 😭
21 points
It has two components. While Rifampicin and Rifabutin (and Penicillin,Amoxi and a few others) are directly showing effects on the contraceptives drugs effects, there is another factor that shouldn’t be underestimated: ABs can and will cause digestive symptoms, fastening gastric passage and that alone is known to reduce the effectiveness of hormonal contraceptives countless times.
5 points
