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Symptoms of overdose can be similar to the medication’s side effects, but are usually more severe. Overdoses may cause hemorrhagic stroke (bleeding in the brain that damages brain tissue), dysrhythmias (abnormal heart or brain rhythms), myocardial infarction (heart attack) or ischemic bowel infarction (death of intestine portion after its blood supply is cut off). Children who overdose on the ingredient phenylpropanolamine may experience hypertensive encephalopathy, a brain disease resulting from high blood pressure. Parents who notice their child exhibiting any of these symptoms should contact a physician immediately:

• Blurred vision
• Chest pain
• Lethargy or stupor
• Loss of ability to control muscle movements (ataxia)
• Loss of contact with reality (psychosis)
• Seizures
• Significant headache
• Significant agitation