What side effects may I notice from receiving Methylphenidate Hydrochloride?

Side effects that you should report to your care team as soon as possible:
-Allergic reactions—skin rash, itching, hives, swelling of the face, lips, tongue, or throat
-Heart attack—pain or tightness in the chest, shoulders, arms, or jaw, nausea, shortness of breath, cold or clammy skin, feeling faint or lightheaded
-Heart rhythm changes—fast or irregular heartbeat, dizziness, feeling faint or lightheaded, chest pain, trouble breathing
-Increase in blood pressure
-Irritability, confusion, fast or irregular heartbeat, muscle stiffness, twitching muscles, sweating, high fever, seizure, chills, vomiting, diarrhea, which may be signs of serotonin syndrome
-Mood and behavior changes—anxiety, nervousness, confusion, hallucinations, irritability, hostility, thoughts of suicide or self-harm, worsening mood, feelings of depression
-Prolonged or painful erection
-Raynaud syndrome—cool, numb, or painful fingers or toes that may change color from pale, to blue, to red
-Seizures
-Stroke—sudden numbness or weakness of the face, arm, or leg, trouble speaking, confusion, trouble walking, loss of balance or coordination, dizziness, severe headache, change in vision
-Sudden eye pain or change in vision such as blurry vision, seeing halos around lights, vision loss
Side effects that usually do not require medical attention (report these to your care team if they continue or are bothersome):
-Dry mouth
-Headache
-Irritation at application site
-Loss of appetite with weight loss
-Nausea
-Pale skin, loss of color around application site
-Stomach pain
-Trouble sleeping

This list may not describe all possible side effects for Methylphenidate Hydrochloride. Call your doctor for medical advice about side effects. You may report side effects to FDA at 1-800-FDA-1088.