• Brain disease or mental retardation or
• Seizures, history of—The risk of seizures may be increased
• Liver disease—Higher blood levels of fevarin may occur, increasing the chance of side effects
• Mania or hypomania, history of—The condition may be activated

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

• More common
• Change in sexual performance or desire 

• Less common
• Behavior, mood, or mental changes;  trouble in breathing;  trouble in urinating;  twitching 

• Rare
• Absence of or decrease in body movements;  blurred vision;  clumsiness or unsteadiness;  convulsions (seizures);  inability to move eyes;  increase in body movements;  menstrual changes;  nose bleeds;  red or irritated eyes;  redness, tenderness, itching, burning or peeling of skin;  skin rash;  sore throat, fever, and chills;  unusual bruising;  unusual, incomplete, or sudden body or facial movements;  unusual secretion of milk, in females ;  weakness 

• Rare--Symptoms of serotonin syndrome (usually three or more occur together)
• Agitation;  confusion;  diarrhea;  fever;  overactive reflexes;  poor coordination;  restlessness;  shivering;  sweating;  talking or acting with excitement you cannot control;  trembling or shaking;  twitching 

• Symptoms of overdose--may be more severe than usual side effects, or two or more may occur together
• Coma;  convulsions (seizures);  diarrhea;  dizziness;  drowsiness;  dryness of mouth;  fast or slow heartbeat ;  large pupils;  low blood pressure;  nausea;  trembling or shaking;  trouble in urinating;  twitching;  vomiting 

In case of overdose, call your local poison control center. If the victim has collapsed or is not breathing, call local emergency services.

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