Can you take too much Ritalin to accidentally overdose? It is recommended that the daily Ritalin dose should not exceed 60 mg. More on Ritalin dosage and safety, here.
Ritalin (methylphenidate) may cause sudden death, heart attack or stroke in people with heart defects or serious heart problems. More here on risks and adverse effects of Ritalin here.
Yes, you can OD on Ritalin. Stimulant intoxication produces a wide array of symptoms including schizophrenic symptoms, manic-like states, psychoses, and various types of anxiety conditions. More details here.