Chlorzoxazone and Acetaminophen (Systemic)

Brand Names : Parafon Forte, chlorzoxazone with APAP

Side Effects of This Medicine

Along with its needed effects, a medicine may cause some unwanted effects. Although not all of these side effects may occur, if they do occur they may need medical attention.

Check with your doctor immediately if any of the following side effects occur:

Rare

Hive-like swellings (large) on face, eyelids, mouth, lips, or tongue; sudden decrease in amount of urine

Symptoms of overdose

Diarrhea; fast or irregular breathing; increased sweating; loss of appetite; muscle weakness (severe); nausea or vomiting; pain, tenderness, or swelling in upper abdomen or stomach area; stomach cramps or pain

Also, check with your doctor as soon as possible if any of the following side effects occur:

Rare

Bloody or black, tarry stools; bloody or cloudy urine; pain in lower back and/or side (severe and/or sharp); pinpoint red spots on skin; skin rash, hives, itching, or redness; sore throat and fever; unusual bleeding or bruising; unusual tiredness or weakness; yellow eyes or skin

Other side effects may occur that usually do not need medical attention. These side effects may go away during treatment as your body adjusts to the medicine. However, check with your doctor if any of the following side effects continue or are bothersome:

More common

Dizziness or lightheadedness; drowsiness

Less common

Constipation; headache; heartburn; unusual excitement, nervousness, restlessness, or irritability

This medicine sometimes causes the urine to turn orange or reddish purple. This is not harmful and will go away when you stop taking the medicine. If you have any questions about this, check with your doctor.

Other side effects not listed above may also occur in some patients. If you notice any other effects, check with your doctor.