Metabolised by CYP 2C but no data pointing to CYP-induction. Three references consider it safe.

(To be edited, initial data ST OCT 04) Vitamin-K antagonist. Metabolized by CYP 2C9. No data pointing to CYP-induction. South African list: use. Kalman, Bonkowski: safe. Michael Moore: safe. C.Andersson; patient reports: tolerated (n=3)

Uneventful use reported in 20 patients with acute porphyria.