hi yes you are right malatonin ............brain stimulant as well as vyvanse.............but vayvanse has first dose heart and blood pressure probs...its better to keep him at home at first dose so that any side effect which occurs can be dealt early and easily take care side effects vyvanse Severe aggression - some patients have reported sudden mood changes, inability to control rage, physical abuse of others Abnormal muscle weakness or tiredness Anaphylaxis - a severe allergic reaction with effects including a rash, hives, itching, difficulty breathing, and generalized swelling. Changes in vision Dyspnea (shortness of breath) Fever Severe headache Syncope (fainting) Angina pectoris (severe chest pain) Blurred vision Cardiac dysrhythmias - a group of cardiovascular conditions in which the electrical activity of the heart is abnormal with effects ranging from a fast heartbeat to cardiac arrest and sudden death. Seizures Tics - sudden, stereotyped, nonrhythmic and repetitive motor movements and/or vocalizations. Hallucinations Muscle tremors Severe irritability Severe psychomotor agitation Altered sexual ability or desire such as hypersexuality, male impotence, premature ejaculation, etc. Tachycardia (fast heartbeat) Slowed thinking Unstable emotions An amphetamine psychosis may also develop occasionally as a treatment emergent side effect