Antipsychotics -- includes butyrophenones (such as haloperidol) and phenothiazines (such as chlorpromazine, fluphenazine, and promethazine)
Phenytoin -- a medication used for seizures
Halothane -- a medication used during general anesthesia
Milk thistle may interfere with the following medications, because both
milk thistle and these medications are broken down by the same liver enzymes:
Allergy drugs -- such as fexofenadine (Allegra)
Drugs for high cholesterol -- such as lovastatin (Mevacor