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. chills
  7. confusion
  8. cough
  9. dark urine
  10. decrease in the frequency of urination
  11. decrease in urine volume
  12. difficulty in passing urine (dribbling)
  13. discouragement
  14. dizziness, faintness, or lightheadedness when getting up suddenly from a lying or sitting position
  15. false beliefs that cannot be changed by facts
  16. fast heartbeat
  17. fast or irregular breathing
  18. feeling sad or empty
  19. feeling that others are watching you or controlling your behavior
  20. feeling that others can hear your thoughts
  21. feeling, seeing, or hearing things that are not there
  22. fever
  23. headache
  24. hyperexcitability
  25. increased muscle spasms or tone
  26. irritability
  27. itching or rash
  28. lack of memory of what takes place after a certain event
  29. loss of appetite
  30. loss of bladder control
  31. loss of interest or pleasure
  32. lower back or side pain
  33. nausea
  34. nightmares
  35. outbursts of anger
  36. painful or difficult urination
  37. pale skin
  38. restlessness
  39. seizures
  40. slurred speech
  41. sore throat
  42. stomach pain
  43. sweating
  44. trouble concentrating
  45. trouble sleeping
  46. trouble speaking
  47. ulcers, sores, or white spots in the mouth
  48. unpleasant breath odor
  49. unusual behavior
  50. unusual bleeding or bruising
  51. unusual feeling of excitement
  52. unusual tiredness or weakness
  53. vomiting of blood
  54. 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: Nov. 01, 2023