The reason I ask is because my step-son, 12 is currently being weened off of vyvanse ( horrible side effects anger, tantrums and defiance) to name a few and we have started intuniv 1mg. He has returned from his mothers house and appears to be a completely different kid. I am amazed. He even did extra credit!! He struggles in math and did extra credit. I'm proud. Just worries he is complaining about a headache, stomachache and feeling hungry. What are the common side effects? He isn't sleeping well either. I take 3mg of melatonin to help me. Would this be safe for him? Help!