Tension (or muscle contraction) headache.
1 tab every 4 hrs; max 5 tabs/day.
Barbiturate + analgesic.
Drug abusers. Severe hepatic or renal impairment. Depression. Suicidal tendencies. Acute abdomen. Elderly. Debilitated. Pregnancy (Cat.C). Nursing mothers: not recommended.
Potentiation with alcohol, MAOIs, general anesthetics, other CNS depressants. May antagonize oral anticoagulants, antibiotics, steroids, tricyclics. May cause false (+) urine test for 5-hydroxyindoleacetic acid.
Drowsiness, lightheadedness, shortness of breath, GI upset, abdominal pain, intoxicated feeling; overdosage: respiratory depression, hepatotoxicity.