Pirox is a non-steroidal anti-inflammatory drug, which is used to treat rheumatoid arthritis or osteoarthritis. Pirox reduces hormones that cause inflammation and pain in the body.

Consult your doctor before using. Use no more than was prescribed. Take it orally with food or milk. For osteoarthritis and rheumatoid arthritis the recommended dose is 20 milligrams (mg) once a day or 10 mg twice a day. Do not use Pirox in children without a doctor's permission.  If you forgot to take your dose in time, please do it as soon as you remember. But do not take if it is too late or almost time for your next dose. Do not increase your recommended dose. Take your usual dose next day in the same regular time.  

Symptoms of Pirox overdose may include: stomach pain, nausea, drowsiness, vomiting, black or bloody stools, shallow breathing, coughing up blood, fainting, or coma. If you experience one of them or any unusual symptoms call your doctor immediately. 

Side effects may include all types of an allergic reaction. Also the most possible side effects include: weakness, chest pain, shortness of breath, problems with vision or balance,slurred speech; bloody, black, or tarry stools; coughing up blood or vomit that looks like coffee grounds; swelling or rapid weight gain; urinating less than usual or not at all; dark urine, nausea, low fever, loss of appetite, clay-colored stools, jaundice, stomach pain; fever, sore throat, and headache with a severe blistering, peeling, and red skin rash; bruising, severe tingling, numbness, pain, muscle weakness;  fever, headache, neck stiffness, chills, increased sensitivity to light, purple spots on the skin, and/or seizure.

Less serious include: upset stomach, mild heartburn or stomach pain, diarrhea, constipation; bloating, gas; dizziness, headache, nervousness; skin itching or rash; blurred vision; ringing in your ears.

If you experience one of them stop using Pirox and tell your doctor as soon as possible. Also consult your doctor about any side effect that seems unusual.