Check with your doctor if any of these most common side effects persist or become bothersome:* change in taste; decreased menstrual flow or painful periods; diarrhea; dry mouth; ejaculation disorder; impotence; increased sweating; loss of appetite; nausea; runny nose; sinus inflammation; tiredness; tremor; upset stomach; weight loss or gain.Seek medical attention right away if any of these severe side effects occur:* severe allergic reactions (rash; hives; difficulty breathing;  tightness in the chest; swelling of the mouth, face, lips, or tongue); anxiety; cold sweat; confusion; dizziness; fatigue; hostility; impulsiveness; irritability; lack of concern; mania; mental/mood changes; panic attacks; restlessness; seizures; shakiness; sleeplessness; sore throat or fever; suicidal thoughts or behaviors; vision changes; worsening of depression.