Ritalin was once taken consistently each day. Notably, a doctor's prescription is required. However, it is also possible to use it for a day, a month, or even a year. ADHD (Attention Deficit Hyperactivity Disorder) has authorized Ritalin. Usually, it doesn't get any better or aid in studying. It can be beneficial to focus, increase activity, etc. It's an active tablet as well. In the class of stimulants that includes methylphenidate.