Find out the dosages of Concerta for helping treat ADHD in adults and children. You can also learn about the drug's form and strengths. The typical starting dose for Concerta in adults is 18 mg to 36 mg, taken once per day. Your doctor may increase your daily dose by 18 mg each week until your dosage provides the desired effect. The typical dosage for Concerta starts at 18 milligrams (mg) daily for children, adolescents, and adults or 36 mg in adults.1 Children may take up to 54 mg daily, and adolescents and adults may take up to 72 mg daily. Detailed dosage guidelines and administration information for Concerta (methylphenidate hydrochloride). Includes dose adjustments, warnings and precautions. Concerta dosage explained: typical starting doses, maximum limits, and adjustment timelines for children, teens, and adults, plus how to tell if it's working. Detailed Methylphenidate dosage information for adults and children. Includes dosages for Attention Deficit Disorder and Narcolepsy; plus renal, liver and dialysis adjustments. Read on for Concerta dosage information, including typical dosage, maximum dosage, adjustments for health conditions, and what to do if you miss a dose.