Those who take Concerta do have a risk of suffering from withdrawals once the medication is stopped, according to Drugs.com. The withdrawal can lead to severe depression.
Concerta is used in patients that have been diagnosed with attention deficit hyperactivity disorder. It is designed to increase a person's ability to pay attention and to help control different behavioral problems, as stated by WebMD. When stopping the medication suddenly, the patient taking it should be monitored for adverse effects because withdrawals can also cause a worsening of hyperactivity, problems concerning sleep and severe irritability. Due to the risks associated with stopping Concerta, dosages should be reduced slowly.