Side Effects

Along with its needed effects, a medicine may cause some unwanted effects. Although not all of these side effects may occur, if they do occur they may need medical attention.

Check with your doctor immediately if any of the following side effects occur:

More common

  1. Blurred vision
  2. discouragement
  3. dizziness
  4. fear or nervousness
  5. feeling sad or empty
  6. headache
  7. irritability
  8. lack of appetite
  9. loss of interest or pleasure
  10. pounding in the ears
  11. slow or fast heartbeat
  12. trouble concentrating
  13. trouble sleeping
  14. unusual tiredness or weakness

Less common

  1. Bladder pain
  2. bloody or cloudy urine
  3. difficult, burning, or painful urination
  4. fast, irregular, pounding, or racing heartbeat or pulse
  5. frequent urge to urinate
  6. lower back or side pain
  7. shakiness in the legs, arms, hands, or feet
  8. trembling or shaking of the hands or feet

Less common or rare

  1. Chest pain or discomfort
  2. nausea
  3. pain or discomfort in the arms, jaw, back, or neck
  4. sweating
  5. vomiting

Rare

  1. Changes in behavior
  2. thoughts of killing oneself

Incidence not known

  1. Aggressive or angry
  2. anxiety
  3. blistering, peeling, or loosening of the skin
  4. chills
  5. clay colored stools
  6. cough
  7. dark urine
  8. delusions of persecution, mistrust, suspiciousness, or combativeness
  9. diarrhea
  10. difficulty with moving
  11. difficulty with swallowing
  12. dry mouth
  13. false beliefs that cannot be changed by facts
  14. feeling that others are watching you or controlling your behavior
  15. feeling, seeing, or hearing things that are not there
  16. fever
  17. hives, itching, or rash
  18. hyperventilation
  19. joint or muscle pain
  20. large, hive-like swelling on the face, eyelids, lips, tongue, throat, hands, legs, feet, or sex organs
  21. muscle stiffness
  22. puffiness or swelling of the eyelids or around the eyes, face, lips, or tongue
  23. red, irritated eyes
  24. restlessness
  25. severe mood or mental changes
  26. sore throat
  27. sores, ulcers, or white spots in the mouth or on the lips
  28. stomach pain or tenderness
  29. swelling of the feet or lower legs
  30. tightness in the chest
  31. unusual behavior
  32. yellow eyes or skin

Get emergency help immediately if any of the following symptoms of overdose occur:

Symptoms of overdose

  1. Blue lips, fingernails, or skin
  2. change in or loss of consciousness
  3. confusion
  4. decreased awareness or responsiveness
  5. dizziness, faintness, or lightheadedness when getting up suddenly from a lying or sitting position
  6. muscle cramps or spasms
  7. severe sleepiness

Some side effects may occur that usually do not need medical attention. These side effects may go away during treatment as your body adjusts to the medicine. Also, your health care professional may be able to tell you about ways to prevent or reduce some of these side effects. Check with your health care professional if any of the following side effects continue or are bothersome or if you have any questions about them:

More common

  1. Difficulty having a bowel movement

Less common

  1. Change or loss of taste
  2. continuing ringing or buzzing or other unexplained noise in the ears
  3. feeling of warmth
  4. hearing loss
  5. increased sweating
  6. redness of the face, neck, arms, and occasionally, upper chest
  7. stomach pain

Less common or rare

  1. Feeling of constant movement of self or surroundings
  2. indigestion
  3. sensation of spinning
  4. severe nausea or vomiting
  5. thinning of the hair or hair loss

Other side effects not listed may also occur in some patients. If you notice any other effects, check with your healthcare professional.

Call your doctor for medical advice about side effects. You may report side effects to the FDA at 1-800-FDA-1088.