You should not use Ritalin if you have glaucoma, tics or Tourette’s syndrome, or severe anxiety, tension, or agitation.
Methylphenidate may be habit-forming, and this medicine is a drug of abuse. Tell your doctor if you have had problems with drug or alcohol abuse.
Stimulants have caused stroke, heart attack, and sudden death in people with high blood pressure, heart disease, or a heart defect.
Do not use Ritalin if you have used an MAO inhibitor in the past 14 days, such as isocarboxazid, linezolid, methylene blue injection, phenelzine, rasagiline, selegiline, or tranylcypromine.
Methylphenidate may cause new or worsening psychosis (unusual thoughts or behavior), especially if you have a history of depression, mental illness, or bipolar disorder.
You may have blood circulation problems that can cause numbness, pain, or discoloration in your fingers or toes.
Call your doctor right away if you have: signs of heart problems – chest pain, feeling light-headed or short of breath; signs of psychosis – paranoia, aggression, new behavior problems, seeing or hearing things that are not real; signs of circulation problems – unexplained wounds on your fingers or toes.
Do not use Ritalin if you have used an MAO inhibitor in the past 14 days. A dangerous drug interaction could occur. MAO inhibitors include isocarboxazid, linezolid, methylene blue injection, phenelzine, rasagiline, selegiline, tranylcypromine, and others.
You should not use Ritalin if you are allergic to methylphenidate, or if you have:
- a personal or family history of tics (muscle twitches) or Tourette’s syndrome; or
- severe anxiety, tension, or agitation (stimulant medicine can make these symptoms worse).
Stimulants have caused stroke, heart attack, and sudden death in certain people. Tell your doctor if you have:
- heart problems or a congenital heart defect;
- high blood pressure; or
- a family history of heart disease or sudden death.
To make sure Ritalin is safe for you, tell your doctor if you or anyone in your family has ever had:
- depression, mental illness, bipolar disorder, psychosis, or suicidal thoughts or actions;
- motor tics (muscle twitches) or Tourette’s syndrome;
- blood circulation problems in the hands or feet;
- seizures or epilepsy;
- problems with the esophagus, stomach, or intestines;
- an abnormal brain wave test (EEG); or
- a history of drug or alcohol addiction.
It is not known whether Ritalin will harm an unborn baby. Tell your doctor if you are pregnant or plan to become pregnant.
It is not known whether methylphenidate passes into breast milk or if it could harm a nursing baby. Tell your doctor if you are breast-feeding a baby.
Ritalin is not approved for use by anyone younger than 6 years old.
Get emergency medical help if you have signs of an allergic reaction to Ritalin: hives; difficulty breathing; swelling of your face, lips, tongue, or throat.
Call your doctor at once if you have:
- signs of heart problems – chest pain, trouble breathing, feeling like you might pass out;
- signs of psychosis – hallucinations (seeing or hearing things that are not real), new behavior problems, aggression, hostility, paranoia;
- signs of circulation problems – numbness, pain, cold feeling, unexplained wounds, or skin color changes (pale, red, or blue appearance) in your fingers or toes;
- a seizure (convulsions);
- muscle twitches (tics);
- changes in your vision; or
- penis erection that is painful or lasts 4 hours or longer (rare).
Methylphenidate can affect growth in children. Tell your doctor if your child is not growing at a normal rate while using this medicine.
Common Ritalin side effects may include:
- mood changes, feeling nervous or irritable, sleep problems (insomnia);
- fast heart rate, increased blood pressure;
- loss of appetite, weight loss;
- nausea, stomach pain; or