Can concerta and stimulants used to treat ADHD have negative effects on my singing voice?

Now I'm not sure on this...but from what I understand...yes concerta and those other ADHD and ADD medications are stimulants to most people, but from what I understand, they act as depressants to people with ADD and ADHD, and I've taken concerta, adderall, and ritalin, and I never had any problems singing along with the radio, but of course each person is different. If you really think it could be the concerta, I'd ask a doctor if it's possible. As another person said, if possible, don't take the concerta when you have to sing, but if it's during or after school then you kinda have to take it to be able to concentrate during your other classes. I'm not 100% positive on what I said, but I'm pretty sure about it, I'd ask a doctor. Hope this helped.  more