When a patient “misuses” prescription drugs, it usually means one of three things: taking the drug in a manner or dose other than prescribed; taking the drug to get high or to achieve some other altered state; or taking another person’s medication, even if it’s for a legitimate complaint, such as pain...Prescription stimulants are used to treat attention-deficit hyperactivity disorder (ADHD) and narcolepsy. They include dextroamphetamine (Dexedrine), dextroamphetamine/amphetamine (Adderall), and methylphenidate (Ritalin or Concerta). These drugs are misused in a variety of ways. They can be taken orally, crushed and dissolved in water, injected, snorted, or smoked.