I disagree with the analysis above regarding
Vyvanse withdrawal. My neuro-psychiatrist indicated that, unlike other ADD medications, my missing 1 day was the cause of Extreme fatigue, depression, irritability along with ADD symptoms. NOT INCLUSIVE EXPLANATION: Vyvanse uses adrenaline/cortisol (fight-flight hormones), stopping is similar to exhaustion following an intense situation and recovery time correlates to how long you've been taking it.