Order Now- https://curecog.com/adhd/ritalin-20-mg/ Ritalin 20 mg is more effective than Ritalin 10 mg. Typically it does not improve or help with studying. Methylphenidate belongs to a class of stimulants. The brand name of Ritalin 20 mg is Concerta, Metadate. Buy Ritalin online, and you can get many products free, Commonly used to treat ADHD.