The common side effects of tramadol include abdominal pain, anxiety, diarrhea, dry mouth and heartburn, notes Mayo Clinic. Other common side effects are irritability, drowsiness, cough, loss of appetite and nausea. Rare side effects of tramadol are blisters under the skin, fast heartbeat, sweats and indigestion, says Drugs.com.
Tramadol is a pain reliever that treats moderate to severe pain, notes Drugs.com. People who have severe asthma or a blockage in the stomach should not take tramadol. Minor symptoms are common when a patient starts taking a new medication. However, when side effects become bothersome or do not fade away, the patient should contact a doctor, states Mayo Clinic.