Many think Concerta (methylphenidate) is safe, or mild, because so many children use it. However, the government classifies the psychoactive drug with cocaine and morphine because it is highly addictive. Concerta (methylphenidate) is a central nervous system stimulant. It affects chemicals in the brain and nerves that contribute to hyperactivity and impulse control. Methylphenidate can be habit-forming. Do not take a larger dose, take it more often, take it for a longer time, or take it in a different way than prescribed by your doctor. Concerta XL 18 mg prolonged-release tablets. - Summary of Product Characteristics (SmPC) by Janssen-Cilag Ltd Stimulants are a class of drugs that “stimulate” the body’s central nervous system, which includes the brain and spinal cord. They increase the levels of catecholamines—a family of brain chemicals that includes dopamine. Avoid drinking alcohol. Alcohol may cause extended-release methylphenidate to be released into the bloodstream too fast. Avoid driving or hazardous activity until you know how this medicine will. WARNING. DRUG DEPENDENCE. CONCERTA® should be given cautiously to patients with a history of drug dependence or alcoholism. Chronic abusive use can lead to marked tolerance and psychological dependence with varying degrees of abnormal behavior. Concerta can cause a variety of unwanted effects. According to E Med TV, weight loss is among the most common side effects, occurring in 6.5 percent of adults and 4 percent of children taking the drug. Know the facts about prescription stimulants and connect with help and support to keep your child safe. What are stimulants? Stimulants are a class of drugs that enhance brain activity. WARNING: DRUG DEPENDENCE. Concerta ® should be given cautiously to patients with a history of drug dependence or alcoholism. Chronic abusive use can lead to marked tolerance and psychological dependence with varying degrees of abnormal behavior.