Robaxin Tablets Side Effects

Please note - some side effects for Robaxin Tablets may not be reported. Always consult your doctor or healthcare specialist for medical advice. You may also report side effects to the FDA.

Side Effects by Body System - for Healthcare Professionals

Applies to: injectable solution; oral tablet

Cardiovascular

Cardiovascular side effects have included syncope, hypotension, and bradycardia.

Nervous system

Nervous system side effects have included dizziness, lightheadedness, vertigo, headache, drowsiness, fainting, and mild muscular incoordination. Convulsions have been reported with intravenous administration, especially in patients with a history of epilepsy.

Dermatologic

Dermatologic side effects have included urticaria, pruritus, rash, sloughing, thrombophlebitis, and pain at the injection site.

Ocular

Ocular side effects have included blurred vision, conjunctivitis, nystagmus, and diplopia.

Respiratory

Respiratory side effects have included nasal congestion, bronchospasm, and anaphylaxis.

Gastrointestinal

Gastrointestinal side effects have included gastrointestinal upset, anorexia, and adynamic ileus.

Other

Other side effects have included metallic taste and fever.

Effects on lab tests have included a possible color interference in certain screening tests for 5-hydroxyindoleacetic acid (5-HIAA) and vanillylmandelic acid (VMA).

Hematologic

Hematologic side effects have included hemolysis, particularly with intravenous injection.

Renal

Methocarbamol vials for injection contain polyethylene glycol 300 (PEG 300). Larger amounts of PEG 300 can increase preexisting renal acidosis and urea retention in patients with renal insufficiency.

Renal side effects including urine discoloration (black, blue, brown, or green) have been reported after oral administration in some patients.

General

General side effects have included angioneurotic edema.

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