Whenever a woman is going to take a medication during treatment with contraceptives, it is advisable to consult with the specialist about the possible interaction between the two. This advice is given not only because of the possibility of pregnancy due to the loss of contraceptive effectiveness, but also because the contraceptive could reduce the effect of the indicated medication.
In addition to rifampicin, other types of drugs that show interaction with oral contraceptives are anticonvulsants such as phenytoin, phenobarbital, primidone, bitobarbital, carbamazepine, ethosuximide or methylphenolbarbital.
For other specific medications, as we have already mentioned, it is advisable to consult with the physician, since the studies are not very clear and, in addition, there may be specific changes due to the situation of each woman.