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Zanaflex and Hepatotoxicity

Result of checking the interaction of drug Zanaflex and disease Hepatotoxicity for safety when used together.

Check result:

Zanaflex <> Hepatotoxicity

Relevance: 23.07.2019 Reviewer: Shkutko P.M., M.D., in

When checking interaction based on authoritative sources Drugs.com, Rxlist.com, Webmd.com, Medscape.com there are contraindications or side effects that may cause harm or increase the negative effect from drug use in presence of concomitant diseases.

Consumer:

Tizanidine may cause hepatocellular injury. According to the manufacturer, approximately 5% of patients treated with tizanidine in clinical studies had elevations in serum transaminases greater than 3 times the upper limit of normal (or 2 times if baseline levels were elevated), compared to 0.4% in control patients. Most cases were asymptomatic and resolved rapidly following withdrawal of the drug. However, liver failure resulting in death has been reported in postmarketing use. In three cases cited by the package labeling, two involved concomitant use of hepatotoxic agents in addition to tizanidine, while the third had no other known risk factors. Because of potential hepatotoxicity, therapy with tizanidine should be administered cautiously in patients with impaired hepatic function. All patients treated with tizanidine should have liver function tests performed at baseline, 1, 3 and 6 months, and periodically thereafter. In addition, they should be instructed to immediately report any signs and symptoms of hepatic injury such as fever, rash, anorexia, nausea, vomiting, fatigue, right upper quadrant pain, dark urine and jaundice.

References:

Wallace JD "Summary of combined clinical analysis of controlled clinical trials with tizanidine." Neurology 44 (11 sup (1994): s60-8;dic. 68-9
Nance PW, Bugaresti J, Shellenberger K, Sheremata W, Martinez-Arizala A "Efficacy and safety of tizanidine in the treatment of spasticity in patients with spinal cord injury. North American Tizanidine Study Group." Neurology 44 (11 sup (1994): s44-51;dic. 51-2
Smith C, Birnbaum G, Carter JL, Greenstein J, Lublin FD "Tizanidine treatment of spasticity caused by multiple sclerosis: results of a double-blind, placebo-controlled trial. US Tizanidine Study Group." Neurology 44 (11 sup (1994): s34-42;dic. 42-3
"Product Information. Zanaflex (tizanidine)." Acorda Therapeutics, Hawthorne, NY.

Zanaflex

Generic Name: tizanidine

Brand Name: Zanaflex

Synonyms: n.a.

What is Zanaflex?