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. Bloating or swelling of the face, arms, hands, lower legs, or feet
  2. chills
  3. confusion
  4. constipation
  5. drowsiness
  6. feeling of warmth
  7. irritability
  8. mental depression
  9. rapid weight gain
  10. redness of the face, neck, arms, and occasionally, upper chest
  11. relaxed and calm feeling
  12. restlessness
  13. sleepiness
  14. sudden sweating
  15. tingling of the hands or feet
  16. trembling or shaking of the hands or feet
  17. unusual weight gain or loss


  1. Abnormal dreams
  2. being forgetful
  3. blurred vision
  4. burning, crawling, itching, numbness, prickling, "pins and needles", or tingling feelings
  5. clumsiness or unsteadiness
  6. confusion about identity, place, and time
  7. dark urine
  8. decrease in frequency or volume of urination
  9. decreased awareness or responsiveness
  10. difficult or labored breathing
  11. difficult or painful urination
  12. dizziness, faintness, or lightheadedness when getting up suddenly from a lying or sitting position
  13. false beliefs that cannot be changed by facts
  14. fast heartbeat
  15. feeling of warmth
  16. fever
  17. indigestion
  18. loss of appetite
  19. nausea
  20. nervousness
  21. pains in the stomach, side, or abdomen, possibly radiating to the back
  22. poor insight and judgment
  23. problems with memory or speech
  24. redness of the face, neck, arms, and occasionally, upper chest
  25. seeing, hearing, or feeling things that are not there
  26. severe nausea or vomiting
  27. severe sleepiness
  28. sweating
  29. tightness in the chest
  30. trouble recognizing objects
  31. trouble thinking and planning
  32. trouble walking
  33. unusual tiredness or weakness
  34. vomiting
  35. yellow eyes or skin

Incidence not known

  1. Agitation
  2. cough
  3. darkening of the skin
  4. diarrhea
  5. difficulty swallowing
  6. dizziness or fainting
  7. hives, itching, skin rash
  8. overactive reflexes
  9. poor coordination
  10. puffiness or swelling of the eyelids or around the eyes, face, lips, or tongue
  11. shivering
  12. talking or acting with excitement you cannot control
  13. twitching

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. Anxiety
  2. belching
  3. decreased appetite
  4. difficulty with moving
  5. excess air or gas in the stomach or bowels
  6. full feeling
  7. heartburn
  8. muscle pain, spasm, or stiffness
  9. pain in the joints
  10. sleepiness or unusual drowsiness
  11. stomach discomfort or upset
  12. unusual drowsiness, dullness, tiredness, weakness, or feeling of sluggishness
  13. weight loss


  1. Cold sweats
  2. dizziness
  3. dry mouth
  4. general feeling of discomfort or illness
  5. headache
  6. inability to have or keep an erection
  7. increased sweating
  8. lack or loss of strength
  9. loss in sexual ability, desire, drive, or performance
  10. night sweats
  11. pressure in the stomach
  12. stomach tenderness
  13. swelling of the stomach area
  14. trouble sleeping
  15. upper abdominal or stomach pain

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.