Side Effects

Drug information provided by: Merative, Micromedex®

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. Aggressive behavior
  2. agitation
  3. anxiety
  4. changes in vision, including blurred vision
  5. difficulty concentrating
  6. difficulty speaking or swallowing
  7. inability to move the eyes
  8. increase in amount of urine
  9. loss of balance control
  10. mask-like face
  11. memory problems
  12. muscle spasms of the face, neck, and back
  13. problems with urination
  14. restlessness or need to keep moving (severe)
  15. shuffling walk
  16. skin rash or itching
  17. stiffness or weakness of the arms or legs
  18. tic-like or twitching movements
  19. trembling and shaking of the fingers and hands
  20. trouble sleeping
  21. twisting body movements

Less common

  1. Back pain
  2. chest pain
  3. speech or vision problems
  4. sudden weakness or numbness in the face, arms, or legs


  1. Confusion
  2. dizziness
  3. drowsiness
  4. extreme thirst
  5. fast, shallow breathing
  6. fast, weak heartbeat
  7. headache
  8. increased thirst
  9. lip smacking or puckering
  10. loss of appetite
  11. muscle cramps
  12. pale, clammy skin
  13. poor coordination
  14. prolonged, painful, inappropriate erection of the penis
  15. puffing of the cheeks
  16. rapid or worm-like movements of the tongue
  17. shivering
  18. talking, feeling, and acting with excitement and activity that cannot be controlled
  19. uncontrolled chewing movements
  20. uncontrolled twisting movements of neck, trunk, arms, or legs
  21. unusual bleeding or bruising
  22. unusual facial expressions or body positions

Incidence not known

  1. Actions that are out of control
  2. bleeding gums
  3. bloating
  4. blood in the urine or stools
  5. bluish lips or skin
  6. change in mental status
  7. chills
  8. clay-colored stools
  9. clumsiness
  10. cold sweats
  11. constipation
  12. cool, pale skin
  13. cough
  14. dark or bloody urine
  15. decrease in the frequency of urination
  16. decrease in urine volume
  17. decreased awareness or responsiveness
  18. depression
  19. difficulty in passing urine (dribbling)
  20. dry mouth
  21. fainting
  22. fast or irregular heartbeat
  23. fever
  24. flushed, dry skin
  25. fruit-like breath odor
  26. hives
  27. hostility
  28. increased hunger
  29. increased urination
  30. indigestion
  31. irregular heartbeat, recurrent
  32. irritability
  33. large, hive-like swelling on face, eyelids, lips, tongue, throat, hands, legs, feet, or genitals
  34. loss of consciousness
  35. low body temperature muscle ache, twitching, or weakness
  36. nausea
  37. nervousness
  38. nightmares
  39. painful urination
  40. pains in the stomach, side, or abdomen, possibly radiating to the back
  41. pinpoint red spots on the skin
  42. puffiness or swelling of the eyelids or around the eyes, face, lips, or tongue
  43. rapid weight gain
  44. seizures
  45. severe constipation
  46. severe sleepiness
  47. shakiness
  48. slurred speech
  49. stomach pain
  50. swelling of the face, ankles, or hands
  51. tightness in the chest
  52. troubled breathing
  53. unexplained weight loss
  54. unpleasant breath odor
  55. unusual drowsiness, dullness, tiredness, weakness, or feeling of sluggishness
  56. vomiting
  57. vomiting of blood
  58. weak or feeble pulse
  59. yellow eyes or skin

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. Diarrhea
  2. heartburn
  3. increased dream activity
  4. increased length of sleep
  5. sore throat
  6. stuffy or runny nose

Less common

  1. Absent, missed, or irregular menstrual periods
  2. body aches or pain
  3. breast swelling or soreness
  4. dandruff
  5. darkening of skin color
  6. decreased interest in sexual intercourse
  7. dry skin
  8. ear congestion
  9. inability to have or keep an erection
  10. increase in body movements
  11. increased watering of the mouth
  12. joint pain
  13. loss in sexual ability, desire, drive, or performance
  14. loss of voice
  15. oily skin
  16. pain or tenderness around the eyes and cheekbones
  17. sneezing
  18. stopping of menstrual bleeding
  19. toothache
  20. unusual breast milk production
  21. weight loss

Incidence not known

  1. Acne
  2. change in taste
  3. enlargement of the penis or testes
  4. growth of pubic hair
  5. loss of taste
  6. rapid increase in height
  7. sleepwalking
  8. thinning or loss of hair

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.