GENERIC NAME: orphenadrine
BRAND NAME: Norflex (Discontinued in the US)
DRUG CLASS AND MECHANISM: Orphenadrine is an oral central acting skeletal muscle relaxant that is used for the treatment of acute muscle aches, pain, or spasms. The exact mechanism of action in relieving muscuar aches or spasms is not completely understood. Orphenadrine may reduce muscle spasms through actions on motor centers or the medulla in the brain. Orphenadrine does not seem to have any direct relaxant effects on skeletal muscle.
Orphenadrine is structurally related to the antihistamine diphenhydramine (Benadryl), however, its antihistamine activity is less than that of diphenhydramine. Orphenadrine also has some local anesthetic effects. The FDA approved Orphenadrine in 1959.
PRESCRIBED FOR: Orphenadrine is used to treat acute muscle aches or spasms. It is usually combined with rest, physical therapy, and other treatment.
SIDE EFFECTS: Side effects of orphenadrine include:
- increased heart rate,
- urinary retention,
- dry mouth,
- dry eyes,
- upset stomach,
- weakness, and
- nasal congestion.
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