SIDE EFFECTS, that may go away during treatment, include nausea, vomiting, loss of appetite, stomach pain, fever, hair loss, ringing in the ears, dizziness, drowsiness, diarrhea, headache, insomnia, strange dreams, or lightheadedness. If they continue or are bothersome, check with your doctor. CONTACT YOUR DOCTOR IMMEDIATELY if you experience fast, slow, or irregular heartbeat, seizures, loss of coordination, numbness and tingling of hands or feet, or vision changes. IF ANY OF THE FOLLOWING SIDE EFFECTS OCCUR, call your doctor; you may need to stop using this medicine: unexplained anxiety, mood changes, depression, hallucinations, restlessness, or confusion. AN ALLERGIC REACTION TO THIS MEDICINE IS UNLIKELY, but seek immediate medical attention if it occurs. Symptoms of an allergic reaction include rash, itching, swelling, severe dizziness, trouble breathing. If you notice other effects not listed above, contact your doctor, nurse, or pharmacist.