Nausea, vomiting, stomach/abdominal pain, loss of appetite, dry mouth, headache, nervousness, dizziness, trouble sleeping, sweating, weight loss, irritability, or restlessness may occur. If any of these effects persist or worsen, tell your doctor promptly. Remember that your doctor has prescribed this medicine because he or she has judged that the benefit to you is greater than the risk of side effects. Many people using this medication do not have serious side effects. Tell your doctor immediately if any of these unlikely but serious side effects occur: blurred vision, fast/pounding/irregular heartbeat, mental/mood/behavior changes (e.g., agitation, aggression, mood swings, depression, hallucinations, abnormal thoughts/behavior), uncontrolled movements, muscle twitching/shaking, outbursts of words/sounds, change in sexual ability/interest, swelling ankles/feet, extreme tiredness, rapid/unexplained weight loss. Seek immediate medical attention if any of these rare but very serious side effects occur: shortness of breath, fainting, chest/jaw/left arm pain, seizures, weakness on one side of the body, slurred speech, confusion, sudden vision changes. A very serious allergic reaction to this drug is unlikely, but seek immediate medical attention if it occurs. Symptoms of a serious allergic reaction may include: rash, itching/swelling (especially of the face/tongue/throat), severe dizziness, trouble breathing. This is not a complete list of possible side effects. If you notice other effects not listed above, contact your doctor or pharmacist. In the US - Call your doctor for medical advice about side effects. You may report side effects to FDA at 1-800-FDA-1088. In Canada - Call your doctor for medical advice about side effects. You may report side effects to Health Canada at 1-866-234-2345.