Can you tell me, are stimulants like ritalin (methylphenidate) addictive?

Yes and no: In proper doses when used for the right reasons, there is no true physical dependency on stimulants, and no withdrawal syndromes. However, when used to get high, in higher doses, for longer periods of time, especially when injected or snorted, there is a "crash" or rebound, associated with depression, irritabilty, increased appetite and other symptoms. Cocaine and methamphetamine esp are problems.

Not if prescribed: When medications like Ritalin (methylphenidate) are prescribed for ADHD and the directions are followed, there is no indication that Ritalin (methylphenidate) is addictive. However, when not prescribed and not taken as directed and mixed with other drugs that are being abused, these medications can be addictive.