Buy Ritalin 10mg Online with your Debit card now it is available in North Dakota also. Ritalin 10 mg is an immediate-release tablet (divisible). A round, flat, white table with slightly beveled edges containing 10mg methylphenidate. The diameter of the tablet is approx. 7mm and is imprinted CG on one side and A/B, with a score on the other. Ritalin 10mg is also used to treat ADHD, ADD, and narcolepsy.