Medication whose action may cause contraceptive failure

Medications which may increase OCP activity 

 Medications whose clearance may be decreased by OCPs

Medications whose action may be decreased by OCPs

• Carbamazepine
• Griseofulvin
• Oxcarbazepine
• Phenobarbitol
• Phenytoin
• Primidone
• Rifampin
• Ritonavir
• St. John's Wort
• Topiramate

• Acetaminophen
• Erythormycin
• Fluoxetine
• Fluconazole
• Fluvoxamine
• Grapefruit juice
• Nefazadone
• Vitamin C

• Amitriptyline
• Caffeine
• Cyclosporine
• Diazepam
• Imipramine
• Phenytoin
• Selegiline
• Theophylline

• Lamotrigine