Side Effects of This Medicine

Phenacemide may cause some serious side effects, including behavior or mental changes, blood problems, liver problems, or kidney problems. You and your doctor should discuss the good this medicine will do as well as the risks of receiving it.

Check with your doctor as soon as possible if any of the following side effects occur:

More common

Behavior or mood changes

Rare

Blood in urine; dark-colored urine; difficulty in breathing, shortness of breath, wheezing, or tightness in chest; drowsiness; flu-like symptoms (fever with or without chills, headache, body ache); nausea or vomiting; skin rash; sore throat and fever; swelling of face, feet, or lower legs; swollen or painful glands; unusual bleeding or bruising; unusual tiredness or weakness; weight gain; white spots, sores, or ulcers on lips, or in mouth or throat; yellow eyes or skin

Symptoms of overdose—(in the order in which they may occur)

Unusual excitement, nervousness, or irritability; clumsiness or unsteadiness; drowsiness (severe)

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

Drowsiness; headache; loss of appetite

Less common or rare

Dizziness; fever; muscle pain; pounding heartbeat; tingling, burning, or prickly sensations; trouble in sleeping; unusual tiredness or weakness; weight loss

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