Here are the list of possible side effects of xanax:
What side effects may occur?
Side effects cannot be anticipated. If any develop or change in intensity, inform your doctor as soon as possible. Only your doctor can determine if it is safe for you to continue taking Xanax. Your doctor should periodically reassess the need for this drug.
Side effects of Xanax are usually seen at the beginning of treatment and disappear with continued medication. However, if dosage is increased, side effects will be more likely.
More common side effects may include:
Abdominal discomfort, abnormal involuntary movement, agitation, allergies, anxiety, blurred vision, chest pain, confusion, constipation, decreased or increased sex drive, depression, diarrhea, difficult urination, dream abnormalities, drowsiness, dry mouth, fainting, fatigue, fluid retention, headache, hyperventilation (too frequent or too deep breathing), inability to fall asleep, increase or decrease in appetite, increased or decreased salivation, impaired memory, irritability, lack of or decreased coordination, light-headedness, low blood pressure, menstrual problems, muscular twitching, nausea and vomiting, nervousness, painful menstruation, palpitations, rapid heartbeat, rash, restlessness, ringing in the ears, sedation, sexual dysfunction, skin inflammation, speech difficulties, stiffness, stuffy nose, sweating, tiredness/sleepiness, tremors, upper respiratory infections, weakness, weight gain or loss
Less common or rare side effects may include:
Abnormal muscle tone, arm or leg pain, concentration difficulties, dizziness, double vision, fear, hallucinations, hot flushes, inability to control urination or bowel movements, infection, itching, joint pain, loss of appetite, muscle cramps, muscle spasticity, rage, seizures, shortness of breath, sleep disturbances, slurred speech, stimulation, talkativeness, taste alterations, temporary memory loss, tingling or pins and needles, uninhibited behavior, urine retention, weakness in muscle and bone, yellow eyes and skin
Side effects due to decrease or withdrawal from Xanax or Xanax XR:
Anxiety, blurred vision, decreased concentration, decreased mental clarity, depression, diarrhea, headache, heightened awareness of noise or bright lights, hot flushes, impaired sense of smell, insomnia, loss of appetite, loss of reality, muscle cramps, nervousness, rapid breathing, seizures, tingling sensation, tremor, twitching, weight loss