Side Effects | Common Cardiovascular: Increased heart rate (Adult, 10.2% to 22.4%; pediatric, 12.2% to 23.4% ) Endocrine metabolic: Weight decreased (Adult, 2%; pediatric, 3% ) Gastrointestinal: Abdominal pain (Adult, 7%; pediatric, 18% ), Constipation (Adult, 8%; pediatric, 1% to 2% ), Decrease in appetite (Adult, 16%; pediatric, 16% ), Nausea (Adult, 26%; pediatric, 10% ), Vomiting (Adult, 4%; pediatric, 11% ), Xerostomia (Adult, 20% ) Neurologic: Dizziness (Adult, 8%; pediatric, 5% ), Headache (Pediatric, 19% ), Insomnia (Adult, 15%; pediatric, at least 2% ), Somnolence (Adult, 8%; pediatric, 11% ) Renal: Delay when starting to pass urine (Adult, 6% ) Reproductive: Dysmenorrhea (Adult, 3% ), Erectile dysfunction (Adult, 8% ) Other: Fatigue (Adult, 10%; pediatric, 8% ) Serious Cardiovascular: Increased diastolic arterial pressure (Adult, 4.8% to 12.6%; pediatric, 9.3% to 21.5% ), Increased systolic arterial pressure (Adult, 4.2% to 12.4%; pediatric, 4.9% to 12.5% ), Myocardial infarction, Sudden cardiac death, Tachycardia (Adult, 1.5%; pediatric, 0.3% ) Hepatic: Injury of liver (Severe), Liver failure Neurologic: Cerebrovascular accident Psychiatric: Aggressive behavior, Hostile behavior, Mania, Psychotic disorder, Suicidal thoughts (Pediatric, 0.4% ) Reproductive: Priapism |