Medications That Decrease OCP Efficacy
| Antibiotics |
| Rifampin (Rifadin, Rimactane) |
| Anticonvulsants |
| Felbamate (Felbatol) |
| Ethosuximide (Zarontin) |
| Primidone (Myidone, Mysoline) |
| Phenobarbital (Solfoton, Barbita, Luminal) |
| Phenytoin (Dilantin, Phenytek) |
| Carbamazepine (Tegretol) |
| Oxcarbazepine (Trileptal) |
| Topiramate (Topamax) |
| Antidepressants |
| St John's wort |
| Antifungal agents |
| Griseofulvin (Fulvicin, Grifulvin, Grisactin, Gris-PEG) |
| Anti-HIV drugs |
| Protease inhibitors |
| Nonnucleoside reverse transcriptase inhibitors |
| Antibiotics |
| Rifampin (Rifadin, Rimactane) |
| Anticonvulsants |
| Felbamate (Felbatol) |
| Ethosuximide (Zarontin) |
| Primidone (Myidone, Mysoline) |
| Phenobarbital (Solfoton, Barbita, Luminal) |
| Phenytoin (Dilantin, Phenytek) |
| Carbamazepine (Tegretol) |
| Oxcarbazepine (Trileptal) |
| Topiramate (Topamax) |
| Antidepressants |
| St John's wort |
| Antifungal agents |
| Griseofulvin (Fulvicin, Grifulvin, Grisactin, Gris-PEG) |
| Anti-HIV drugs |
| Protease inhibitors |
| Nonnucleoside reverse transcriptase inhibitors |