The antidepressant drug paroxetine (Paxil, Paxil CR, Pexeva) can cause serious side effects. If you notice any of the following new or worsened symptoms, alert your doctor immediately: agitation, anxiety, irritability, mood changes, panic attacks, physical or mental hyperactivity, restlessness, sleeping problems, suicidal thoughts or thoughts of hurting yourself.
You should also alert your doctor immediately if you notice: bleeding or bruising easily, diarrhea, erratic or rapid heartbeat, feeling confused, feeling uncoordinated or unsteady, fainting, fever, hallucinations, headache, lack of appetite, nausea or vomiting, overactive reflexes, problems with memory or concentration, seizure, stopped breathing or breathing shallowly, sweating, trembling or weakness.
Seek emergency medical attention if you notice symptoms of an allergic reaction: hives or an itchy rash, difficulty breathing, or swelling in the face, mouth, or throat. Other side effects may include: change in weight, constipation, dry mouth, feeling dizzy, drowsy, or nervous, gas, genital disorders, impotence, lowered sex drive, or trouble ejaculating or having an orgasm, minor nausea, ringing in the ears, trouble sleeping, vertigo or yawning. In general, talk to your doctor about any side effects that worry you or seem unusual.