<qa>  What is the name of the anticonvulsant drugs known to affect or interfere with the8. Use of one or more of the following drugs within the last two months: hepatic microsomal enzyme-inducing anticonvulsant drugs known to affect or interfere with the pharmacokinetics of steroids e.g. hydantoins, barbiturates such as Phenobarbital alone or in combinations, such as Bellergal rifampicin, griseofulvin, primidone or carbamazepine. 