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;

• confusion, hallucinations, or seizure (convulsions);

• easy bruising or bleeding, unusual weakness;

• feeling light-headed, fainting;

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

• tremors or uncontrollable shaking;

• urinating less than usual or not at all; or

• extreme thirst with headache, nausea, vomiting, and weakness.

Less serious side effects may include:

• nausea, vomiting, constipation, loss of appetite;

• dry mouth;

• weight changes;

• weakness, lack of coordination;

• numbness or tingly feeling;

• feeling dizzy, drowsy, or tired;

• sleep problems (insomnia), nightmares;

• blurred vision, headache, ringing in your ears;

• increased sweating;

• 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.