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. Shakiness and unsteady walk
  2. unsteadiness, trembling, or other problems with muscle control or coordination

Incidence not known

  1. Agitation
  2. black, tarry stools
  3. blistering, flaking, or peeling of the skin
  4. blurred vision
  5. changes in patterns and rhythms of speech
  6. changes in vision
  7. chills
  8. confusion
  9. cough
  10. dark urine
  11. decrease in the frequency of urination
  12. decrease in urine volume
  13. difficulty in passing urine (dribbling)
  14. discouragement
  15. dizziness, faintness, or lightheadedness when getting up suddenly from a lying or sitting position
  16. false beliefs that cannot be changed by facts
  17. fast heartbeat
  18. fast or irregular breathing
  19. feeling sad or empty
  20. feeling that others are watching you or controlling your behavior
  21. feeling that others can hear your thoughts
  22. feeling, seeing, or hearing things that are not there
  23. fever
  24. headache
  25. hyperexcitability
  26. increased muscle spasms or tone
  27. irritability
  28. itching or rash
  29. lack of memory of what takes place after a certain event
  30. loss of appetite
  31. loss of bladder control
  32. loss of interest or pleasure
  33. loss of vision
  34. lower back or side pain
  35. nausea
  36. nightmares
  37. outbursts of anger
  38. painful or difficult urination
  39. pale skin
  40. restlessness
  41. seizures
  42. slurred speech
  43. sore throat
  44. stomach pain
  45. sweating
  46. trouble concentrating
  47. trouble sleeping
  48. trouble speaking
  49. ulcers, sores, or white spots in the mouth
  50. unpleasant breath odor
  51. unusual behavior
  52. unusual bleeding or bruising
  53. unusual feeling of excitement
  54. unusual tiredness or weakness
  55. vomiting of blood
  56. yellow eyes or skin

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. difficult or trouble breathing
  6. excitement
  7. irregular, fast or slow, or shallow breathing
  8. irritability
  9. lack of coordination
  10. loss of consciousness
  11. loss of strength or energy
  12. muscle pain or weakness
  13. pale or blue lips, fingernails, or skin
  14. restlessness
  15. shakiness and unsteady walk
  16. sleepiness
  17. unsteadiness, trembling, or other problems with muscle control or coordination
  18. unusual drowsiness, dullness, tiredness, weakness, or feeling of sluggishness

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:

Incidence not known

  1. Constipation
  2. decreased interest in sexual intercourse
  3. diarrhea
  4. difficulty with swallowing
  5. double vision
  6. dry mouth
  7. feeling of constant movement of self or surroundings
  8. inability to have or keep an erection
  9. increase in sexual ability, desire, drive, or performance
  10. increased interest in sexual intercourse
  11. increased watering of the mouth
  12. indigestion
  13. loss of sexual ability, desire, drive, or performance
  14. passing of gas
  15. seeing double
  16. sensation of spinning

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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Portions of this document last updated: June 01, 2024

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