Concerta (Methylphenidate) 18mg is a central nervous system stimulant used for treating attention deficit hyperactivity disorder (ADHD). Side effects of Concerta include: stomach pain, loss of appetite, headache, dry mouth, nausea, vomiting, sleep problems (insomnia), anxiety, dizziness, weight loss, irritability, vision problems, skin rash, nervousness, numbness/tingling/cold feeling in the hands or feet, and sweating. Chronic use of Concerta may lead […]