Ritalin 20mg is the highest dose of Ritalin medicine. It is used in the maintenance phase or in severe cases of ADHD treatment. It contains the methylphenidate that works on our body and increases the level of some chemicals by which an ADHD patient feels awakened and attentive. This tablet looks like a round shape, white to off-white colored with the imprint “CIBA” on it. It can be taken by mouth before or after food according to the prescription. You can buy Ritalin 20mg Online or offline by showing the prescription.