What side effects may I notice from receiving Methylphenidate Hydrochloride?

Side effects that you should report to your doctor or health care professional as soon as possible:
-allergic reactions like skin rash, itching or hives, swelling of the face, lips, or tongue
-changes in vision
-chest pain or chest tightness
-fast, irregular heartbeat
-fingers or toes feel numb, cool, painful
-hallucination, loss of contact with reality
-high blood pressure
-males: prolonged or painful erection
-seizures
-severe headaches
-severe stomach pain, vomiting
-shortness of breath
-suicidal thoughts or other mood changes
-trouble swallowing
-trouble walking, dizziness, loss of balance or coordination
-uncontrollable head, mouth, neck, arm, or leg movements
-unusual bleeding or bruising

Side effects that usually do not require medical attention (report to your doctor or health care professional if they continue or are bothersome):
-anxious
-headache
-loss of appetite
-nausea
-trouble sleeping
-weight loss

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.