How to inject ritalin directionsattention-deficit/hyperactivity disorder, although the magnitude and direction . . . . . . tend to be forgetful, have problems following directions . . permanent and irreversible lung tissue damage related to the injection of crushed Ritalin . . . . . . . . In substance dependence and recreational drug use, drug injection is a method of introducing a drug into the body with a hollow needle and a syringe which is pierced through . . Ritalin and Other Methylphenid... more