In the first decade of the 20th century, Einstein produced the theory of the conversion of mass into energy, E=mC(2), which was confirmed by laboratory observations. A new theory of the atom was devised by the English physicist Rutherford in 1913.
Methylphenidate, Methylin. Generic Ritalin. Methylphenidate (methylin) is a moderately priced drug used to treat attention-deficit hyperactivity disorder (ADHD). It is also used to treat narcolepsy. This drug is slightly more popular than comparable drugs. It is available in brand and generic versions.
Ritalin vs. Adderall Comparison Chart. Below is a general comparison chart to help you assess basic differences between Ritalin (methylphenidate) and Adderall (mixed amphetamine salts). Understand that Ritalin was the first medication approved for the treatment of ADHD in 1955, whereas Adderall didnât hit the market until 1996.