Question: why do stimulants make me sleepy?
Answer: Sleepiness is an uncommon side effect of Adderall, but it does happen. It's usually related to an Adderall crash after stopping use of the medication abruptly. It may also just be that Adderall has more of a calming effect on you. If sleepiness from Adderall is interfering with your daily life, talk to your doctor.