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. Abdominal or stomach discomfort
  2. cough or hoarseness
  3. decreased appetite
  4. diarrhea
  5. fast or shallow breathing
  6. fever or chills
  7. general feeling of discomfort
  8. lower back or side pain
  9. muscle pain or cramping
  10. painful or difficult urination
  11. sleepiness

Less common

  1. Anxiety
  2. blurred vision
  3. chest discomfort
  4. cold sweats
  5. coma
  6. confusion
  7. cool, pale skin
  8. depression
  9. difficult or labored breathing
  10. dizziness
  11. fast, irregular, pounding, or racing heartbeat or pulse
  12. feeling of warmth
  13. headache
  14. increased hunger
  15. increased sweating
  16. nausea
  17. nervousness
  18. nightmares
  19. redness of the face, neck, arms, and occasionally, upper chest
  20. seizures
  21. shakiness
  22. shortness of breath
  23. slurred speech
  24. tightness in the chest
  25. unusual tiredness or weakness


  1. Behavior change similar to being drunk
  2. difficulty with concentrating
  3. drowsiness
  4. lack or loss of strength
  5. restless sleep
  6. unusual 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. Acid or sour stomach
  2. belching
  3. bloated
  4. excess air or gas in the stomach or intestines
  5. full feeling
  6. heartburn
  7. indigestion
  8. loss of appetite
  9. metallic taste in the mouth
  10. passing of gas
  11. stomachache
  12. stomach upset or pain
  13. vomiting
  14. weight loss

Less common

  1. Abnormal stools
  2. bad, unusual, or unpleasant (after) taste
  3. change in taste
  4. difficulty with moving
  5. discoloration of the fingernails or toenails
  6. flu-like symptoms
  7. joint pain
  8. metallic taste in mouth
  9. rash
  10. runny nose
  11. sneezing
  12. stuffy nose
  13. swollen joints

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.