Call your doctor at once if you have any new or worsening symptoms such as: mood or behavior changes, anxiety, panic attacks, trouble sleeping, or if you feel impulsive, irritable, agitated, hostile, aggressive, restless, hyperactive (mentally or physically), more depressed, or have thoughts about suicide or hurting yourself.

• fast, pounding, or uneven heart rate, chest pain or heavy feeling, pain spreading to the arm or shoulder, nausea, sweating, general ill feeling;

• sudden numbness or weakness, especially on one side of the body;

• sudden headache, confusion, problems with vision, speech, or balance;

• hallucinations, or seizures (convulsions), feeling light-headed, fainting;

• restless muscle movements in your eyes, tongue, jaw, or neck, uncontrollable shaking or tremor;

• skin rash, severe tingling, numbness, pain, muscle weakness;

• easy bruising or bleeding;

• extreme thirst with headache, nausea, vomiting, and weakness; or

• urinating less than usual or not at all.

Less serious side effects may include:

• nausea, vomiting, constipation, diarrhea, loss of appetite;

• dry mouth, unpleasant taste;

• feeling dizzy, drowsy, or tired;

• trouble concentrating;

• nightmares;

• blurred vision, headache, ringing in your ears;

• breast swelling (in men or women); or

• decreased sex drive, impotence, or difficulty having an orgasm.

This is not a complete list of side effects and others may occur. Tell your doctor about any unusual or bothersome side effect.