Buy Ritalin 10mg For sale~ smooth Credit Card Payment $ | Buy Ritalin 10mg for sale via credit card with smooth free transaction. This medication is used to treat attention deficit hyperactivity disorder - ADHD. It works by changing the amounts of certain natural substances in the brain. Methylphenidate belongs to a class of drugs known as stimulants. It can help increase your ability to pay attention, stay focused on an activity, and control behavior problems.