What are risks taking 40 mgs of Strattera when 16 years old?

The risks are the same as for everyone. 40 mg of Strattera is not a large dose; for people who weigh more than 70 kg (about 150 pounds), it is the usual starting dose (and we usually increase the dosage from there). In teens, though, the medication does have a new warning about increase feelings of suicide, especially when starting it or changing the dose; your physician hopefully warned you about this and mentioned how to get help if you do start feeling this way. I have prescribed lots of Strattera to teens and find that most people do not have side effects. A few have mentioned some nausea, which is usually resolved by having them take the medicine with food in the morning. Taking it at night has seemed to lead to some sleep disturbance in some as well. The biggest problem some people have with Strattera is it not relieving their ADHD symtpoms; if this is the case, the medicine either should be increased up to the maximum dose or switched to another medication--or the diagnosis should be re-examined. Talk to your physician if you have any concerns about Strattera or any other medications you may be on. Hope this helps! Dr. B.