Preexisting Conditions

• According to drugs.com, Percodan is not recommended if you have asthma, a mental illness, pancreatic disease, a seizure disorder, a history of ulcers, kidney disease, liver disease, spinal curvature, or if you have had brain tumors, a head injury, or an addiction to drugs and alcohol.
  
  

Pregnancy

• Percodan is an FDA classified D drug, meaning that it is harmful to an unborn baby, according to drugs.com. Do not use Percodan if you are planning to become pregnant.
  
  

Symptoms

• Call your doctor immediately if you experience a rapid heart beat, hallucinations, confusion, urination problems, black or bloody stools, slow heart beat, shallow breathing, faintness, bloody vomit, or if you suddenly start to bleed or bruise easily.
  
  

Overdose

• If you think you may have overdosed on Percodan, go to the emergency room immediately. Taking too much Percodan can be life-threatening.
  
  

Common Side Effects

• Other common side effects of Percodan include dry mouth, headache, dizziness, sweating, drowsiness, heartburn, ringing in the ears, constipation, bloating, nausea, diarrhea, vomiting, and upset stomach. These side effects are not serious, according to drug.com, but you should still report them to your doctor.