Probably CYP (2C9?) substrate. No data pointing to CYP-induction Two references consider it (probably) safe.

(To be edited, initial data ST OCT 04) Caps./supp. 50-200 mg/d. Analgetic and antiflogistic propionic acid derivative. Metabolized (2C9?) in the liver )by conjugation with glucuronic acid. South African list: use with care. French list: authorized. C.Andersson; patient reports: tolerated (n=1).