My son who is 10 is autistic and has ADHD. Adderall didn’t work for him at all! He’s on Vyvanse 50 mg and now is going to be taking Intuniv 2 mg for his behavior. I’m wondering if taking in Intuniv at 3 in the afternoon is OK? His doctor told me do it in the afternoon and Vyvanse in the morning. I’m very worried that it’s too much?