Not indicated or recommended for wt loss. Avoid afternoon doses because of the potential for insomnia. High potential for abuse, misuse, & addiction; assess risk before prescribing & frequently monitor for signs & symptoms throughout treatment. Assess for the presence of cardiac disease prior to initiating treatment. Avoid use in patients w/ known structural cardiac abnormalities, cardiomyopathy, serious cardiac arrhythmia, CAD, or other serious cardiac disease. Monitor for potential tachycardia & HTN. May exacerbate symptoms of behavior disturbance & thought disorder in patients w/ pre-existing psychotic disorder. May induce a manic or mixed episode in patients w/ bipolar disorder. May cause psychotic or manic symptoms in patients w/o prior history of psychotic illness or mania. Associated w/ wt loss & slowing of growth rate in ped patients; closely monitor growth (wt & height). Associated w/ peripheral vasculopathy, including Raynaud's phenomenon; carefully observe for digital changes during treatment. Associated w/ onset or exacerbation of motor & verbal tics & worsening of Tourette's syndrome; assess family history & clinically evaluate patients before initiating treatment. Post-marketing reports of suicide-related events; monitor for signs of suicide-related behavior. Immediately discontinue treatment w/ Vyvanse & any concomitant serotonergic agents if symptoms of serotonin syndrome occur. Reduced clearance in patients w/ severe renal impairment or ESRD. Not dialyzable. May decrease placental perfusion. Increased risk of premature delivery & low birth wt in infants born to amphetamine-dependent mothers; monitor for w/drawal symptoms eg, feeding difficulties, irritability, agitation, & excessive drowsiness. Breastfeeding is not recommended during treatment. Not approved for use in ped patients <6 yr.