Generic Name and Formulations:
Chlorzoxazone 375mg, 750mg+; tabs; +scored.
Various generic manufacturers
Indications for Chlorzoxazone:
As adjunct to rest, physical therapy, and other measures in acute, painful musculoskeletal conditions.
375mg: 1 tab 3–4 times daily; may increase to 2 tabs (750mg) 3–4 times daily if inadequate response. 750mg: ⅓ tab (250mg) 3–4 times daily. Painful musculoskeletal conditions: initially ⅔ tab (500mg) 3–4 times daily; may increase to 1 tab (750mg) 3–4 times daily if inadequate response. May reduce dose based on improvement.
Known drug intolerance.
Monitor for hepatotoxicity; discontinue if hepatic dysfunction or abnormal liver enzymes develop. Known allergies or history of. Discontinue if sensitivity reaction occurs. Pregnancy.
Muscle relaxant (central).
Additive effects with concomitant alcohol, other CNS depressants.
Drowsiness, dizziness, lightheadedness, malaise, overstimulation; rare: skin rash, petechiae, ecchymosis, fatal hepatocellular toxicity.
Formerly known under the brand name Lorzone, Paraflex.