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:

Less common

  1. Burning, crawling, itching, numbness, prickling, "pins and needles", or tingling feelings
  2. chills
  3. cold sweats
  4. confusion
  5. difficult urination
  6. dizziness, faintness, or lightheadedness when getting up from lying or sitting position
  7. fainting
  8. fast, irregular, pounding, or racing heartbeat or pulse
  9. fear or nervousness
  10. heavy feeling
  11. increased need to urinate
  12. passing urine more often
  13. restlessness
  14. shakiness in the legs, arms, hands, or feet
  15. sudden jerky movements of the body
  16. sweating
  17. trembling or shaking of the hands or feet
  18. trouble sitting still

Incidence not known

  1. Agitation
  2. burning while urinating
  3. change in consciousness
  4. decrease in frequency of urination
  5. decrease in urine volume
  6. decreased urine output
  7. depression
  8. difficulty in passing urine (dribbling)
  9. dizziness
  10. false or unusual sense of well-being
  11. headache
  12. hostility
  13. irritability
  14. loss of bladder control
  15. loss of consciousness
  16. muscle twitching
  17. nausea
  18. need to keep moving
  19. numbness or tingling of the hands, feet, or face
  20. rapid weight gain
  21. seeing, hearing, or feeling things that are not there
  22. seizures
  23. shakiness and unsteady walk
  24. stupor
  25. swelling of the face, ankles, or hands
  26. unsteadiness, trembling, or other problems with muscle control or coordination
  27. unusual tiredness or weakness

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. Constipation
  2. dry mouth

Less common

  1. Decreased interest in sexual intercourse
  2. drowsiness
  3. inability to have or keep an erection
  4. loss in sexual ability, desire, drive, or performance
  5. relaxed and calm
  6. sleepiness
  7. sleeplessness
  8. trouble sleeping
  9. unable to sleep
  10. unusual drowsiness, dullness, tiredness, weakness, or feeling of sluggishness

Incidence not known

  1. Black tongue
  2. blurred vision
  3. change in vision
  4. impaired vision
  5. increased sensitivity of the skin to sunlight
  6. itching
  7. raised, dark red, wart-like spots on the skin, especially when used on the face
  8. redness or other discoloration of the skin
  9. severe sunburn
  10. skin rash

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.

Portions of this document last updated: Nov. 01, 2023