Common side effects include:

• Decreased appetite
• Dry mouth
• Trouble sleeping
• Dizziness
• Stomach ache
• Increased sweating
• Headache
• Nausea
• Anxiety
• Weight loss
• Irritability

The following have been reported with use of methylphenidate HCl and other stimulant medicines:

Heart-related problems:

• Sudden death in patients who have heart problems or heart defects
• Stroke and heart attack in adults
• Increased blood pressure and heart rate

Mental (Psychiatric) problems:

All Patients

• New or worse behavior and thought problems
• New or worse bipolar illness
• New or worse aggressive behavior or hostility

Children and Teenagers

• New psychotic symptoms (such as hearing voices, believing things that are not true, are suspicious) or new manic symptoms

Other serious side effects include:

• Slowing of growth (height and weight) in children
• Seizures, mainly in patients with a history of seizures
• Eyesight changes or blurred vision
• Blockage of the esophagus, stomach, small or large intestine in patients who already have a narrowing in any of these organs