Will concerta cause weight gain?

Very unlikley. In fact, 6-9% of patients utilizing Concerta suffer from weight loss!
No. Concerta does not cause weight gain. It is a stimulant, so decreases appetite and can cause weight loss in a teen or adult, or a decrease in the rate of weight gain if used in a growing child. A person using Concerta should follow-up with the prescribing doctor to be sure his weight and nutrition are ok.