Downloaded and excerpted from the Food and Drug Administration's website FDA.gov (link is http://www.fda.gov/downloads/Drugs/DrugSafety/ucm089090.pdf)
MEDICATION GUIDE RITALIN (methylphenidate hydrochloride, USP) tablets CII
What is the most important information I should know about RITALIN?
The following have been reported with use of methylphenidate hydrochloride and other stimulant medicines.
1. Heart-related problems:
Tell your doctor if you or your child have any heart problems, heart defects, high blood pressure, or a family history of these problems. Your doctor should check you or your child carefully for heart problems before starting RITALIN. Your doctor should check your or your child's blood pressure and heart rate regularly during treatment with RITALIN. Call your doctor right away if you or your child has any signs of heart problems such as chest pain, shortness of breath, or fainting while taking RITALIN.
2. Mental (Psychiatric) problems:
Children and Teenagers
Tell your doctor about any mental problems you or your child have, or about a family history of suicide, bipolar illness, or depression. Call your doctor right away if you or your child have any new or worsening mental symptoms or problems while taking RITALIN, especially seeing or hearing things that are not real, believing things that are not real, or are suspicious.
3. Circulation problems in fingers and toes [Peripheral vasculopathy, including Raynaud's phenomenon]:
Tell your doctor if you have or your child has numbness, pain, skin color change, or sensitivity to temperature in the fingers or toes. Call your doctor right away if you have or your child has any signs of unexplained wounds appearing on fingers or toes while taking RITALIN.
What are possible side effects of RITALIN?
See "What is the most important information I should know about RITALIN?" for information on reported heart and mental problems.
Other serious side effects include:
Common side effects include: