Hypotension and cardiac arrest have been reported with the concomitant use of propranolol and haloperidol. Greatly reduces intestinal absorption of propranolol. Slows the rate of absorption of propranolol. When used concomitantly with propranolol, results in increased plasma levels of both drugs. T 3 concentration when used concomitantly with propranolol.
Clearance is reduced when used concomitantly with propranolol.