- rifampicin
- antiepileptics except sodium valproate
- griseofulvin
- smoking
- st johns wort
- barbituates
- chronic alcohol
P450 inhibitors include:
- anti-infection meds
- ciprofloxacin
- erythromycin
- ketoconazole
- isoniazid
- Anti reflux
- cimetidine
- omeprazole
- Pysch meds
- SSRIs
- antipyschotics
- TCA
- sodium valproate
- acute alcohol
- class IV antiarrhymics
- diltiazen
- verapamil
