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. Being forgetful
  2. changes in patterns and rhythms of speech
  3. clumsiness or unsteadiness
  4. difficulty with coordination
  5. discouragement
  6. drowsiness
  7. feeling sad or empty
  8. irritability
  9. lack of appetite
  10. lightheadedness
  11. loss of interest or pleasure
  12. relaxed and calm
  13. shakiness and unsteady walk
  14. sleepiness
  15. slurred speech
  16. tiredness
  17. trouble concentrating
  18. trouble performing routine tasks
  19. trouble sleeping
  20. trouble speaking
  21. unsteadiness, trembling, or other problems with muscle control or coordination
  22. unusual tiredness or weakness

Less common

  1. Blurred vision
  2. body aches or pain
  3. burning, crawling, itching, numbness, prickling, "pins and needles, or tingling feelings
  4. changes in behavior
  5. chest tightness
  6. chills
  7. clay-colored stools
  8. confusion about identity, place, and time
  9. cough
  10. dark urine
  11. decrease in frequency of urination
  12. decrease in urine volume
  13. diarrhea
  14. difficult or labored breathing
  15. difficulty in passing urine (dribbling)
  16. difficulty with concentration
  17. difficulty with moving
  18. dizziness, faintness, or lightheadedness when getting up suddenly from a lying or sitting position
  19. dry mouth
  20. ear congestion
  21. environment seems unreal
  22. fainting
  23. feeling of unreality
  24. feeling warm
  25. fever
  26. general feeling of discomfort or illness
  27. headache
  28. inability to move the eyes
  29. inability to sit still
  30. increased blinking or spasms of the eyelid
  31. irregular heartbeats
  32. itching or rash
  33. joint pain
  34. lack or loss of self-control
  35. loss of bladder control
  36. loss of coordination
  37. loss of memory
  38. loss of voice
  39. mood or mental changes
  40. muscle aches, cramps, pain, stiffness, or weakness
  41. nausea
  42. need to keep moving
  43. painful urination
  44. problems with memory
  45. restlessness
  46. runny or stuffy nose
  47. seeing, hearing, or feeling things that are not there
  48. seizures
  49. sense of detachment from self or body
  50. shaking
  51. shivering
  52. sneezing
  53. sore throat
  54. sticking out of the tongue
  55. stomach pain
  56. sweating
  57. swollen joints
  58. talkativeness
  59. trouble with balance
  60. twitching, twisting, or uncontrolled repetitive movements of the tongue, lips, face, arms, or legs
  61. uncontrolled twisting movements of the neck, trunk, arms, or legs
  62. unpleasant breath odor
  63. unusual dullness or feeling of sluggishness
  64. unusual facial expressions
  65. unusually deep sleep
  66. unusually long duration of sleep
  67. vomiting of blood
  68. yellow eyes or skin


  1. Actions that are out of control
  2. attack, assault, or force
  3. chest pain
  4. continuing ringing or buzzing or other unexplained noise in the ears
  5. decreased awareness or responsiveness
  6. deep or fast breathing with dizziness
  7. ear pain
  8. false or unusual sense of well-being
  9. fast, irregular, pounding, or racing heartbeat or pulse
  10. feeling jittery
  11. feeling unusually cold
  12. generalized slowing of mental and physical activity
  13. hearing loss
  14. hoarseness
  15. lack of feeling or emotion
  16. loss of control of the legs
  17. loss of strength or energy
  18. nightmares
  19. numbness of the feet, hands, and around mouth
  20. severe sleepiness
  21. shakiness in the legs, arms, hands, or feet
  22. sleep talking
  23. swelling
  24. talking, feeling, and acting with excitement
  25. thoughts of killing oneself
  26. uncaring
  27. unusual weak feeling
  28. voice changes

Incidence not known

  1. Light-colored stools
  2. upper right abdominal or stomach pain

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

Symptoms of overdose

  1. Agitation
  2. change in consciousness
  3. changes in patterns and rhythms of speech
  4. confusion
  5. lack of coordination
  6. loss of consciousness
  7. loss of strength or energy
  8. shakiness and unsteady walk
  9. slurred speech
  10. sleepiness or unusual drowsiness
  11. talkativeness
  12. unsteadiness, trembling, or other problems with muscle control or coordination
  13. unusual drowsiness, dullness, tiredness, weakness, or feeling of sluggishness
  14. unusual excitement, nervousness, restlessness, or irritability
  15. unusual weak feeling

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. Absent, missed, or irregular menstrual periods
  2. decreased appetite
  3. decreased interest in sexual intercourse
  4. decreased sexual performance or desire abnormal ejaculation
  5. difficulty having a bowel movement (stool)
  6. inability to have or keep an erection
  7. increased appetite
  8. increased in sexual ability, desire, drive, or performance
  9. increased interest in sexual intercourse
  10. increased weight
  11. loss in sexual ability, desire, drive, or performance
  12. stopping of menstrual bleeding
  13. watering of the mouth
  14. weight loss

Less common

  1. Blistering, crusting, irritation, itching, or reddening of the skin
  2. change in taste bad unusual or unpleasant (after) taste
  3. cracked, dry, or scaly skin
  4. double vision
  5. feeling of warmth
  6. heavy bleeding
  7. menstrual changes
  8. pelvic pain
  9. redness of the face, neck, arms, and occasionally, upper chest
  10. seeing double
  11. stomach bloating and cramping
  12. sudden sweating
  13. unexplained runny nose or sneezing


  1. Acid or sour stomach
  2. belching
  3. bigger, dilated, or enlarged pupils (black part of the eye)
  4. change in color vision
  5. difficulty seeing at night
  6. feeling of constant movement of self or surroundings
  7. feeling of relaxation
  8. heartburn
  9. hives or welts
  10. increased sensitivity of the eyes to sunlight
  11. indigestion
  12. redness of the skin
  13. sensation of spinning
  14. stomach discomfort or upset

Incidence not known

  1. Blistering, peeling, or loosening of the skin
  2. red, irritated eyes
  3. red skin lesions, often with a purple center
  4. sores, ulcers, or white spots in the mouth or on the lips
  5. swelling of the breasts or breast soreness in both females and males
  6. unexpected or excess milk flow from the breasts

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.

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