Side Effects

Drug information provided by: IBM 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. Dizziness or lightheadedness, especially when getting up from a lying or sitting position
  2. nausea

Less common—reported more often in patients with Parkinson's disease

  1. Confusion
  2. seeing, hearing, or feeling things that are not there
  3. uncontrolled movements of the body, such as the face, tongue, arms, hands, head, and upper body

Rare—reported more often in patients taking large doses

  1. Increased frequency of urination
  2. loss of appetite, continuing
  3. lower back pain
  4. runny nose, continuing
  5. stomach pain, continuing or severe
  6. weakness


  1. Black, tarry stools
  2. bloody vomit
  3. blurred vision
  4. fainting
  5. fast heartbeat
  6. increased sweating
  7. nausea
  8. nervousness
  9. seizures
  10. severe chest pain
  11. sudden weakness
  12. temporary blindness
  13. unusual headache
  14. vomiting, continuing or severe

Incidence not known

  1. Agitation
  2. anxiety
  3. blue or pale skin
  4. chest pain, possibly moving to the left arm, neck, or shoulder
  5. chills
  6. difficulty in breathing
  7. difficulty in speaking
  8. double vision
  9. false beliefs that cannot be changed by facts
  10. fever
  11. headache
  12. high fever
  13. high or low blood pressure
  14. inability to move the arms, legs, or facial muscles
  15. inability to speak
  16. increased frequency of urination
  17. loss of bladder control
  18. lower back pain
  19. severe muscle stiffness
  20. slow speech
  21. troubled or quick, shallow breathing
  22. unusual tiredness or weakness
  23. unusually pale 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:

Less common

  1. Constipation
  2. diarrhea
  3. drowsiness or tiredness
  4. dry mouth
  5. leg cramps at night
  6. loss of appetite
  7. mental depression
  8. stomach pain
  9. stuffy nose
  10. tingling or pain in the fingers and toes when exposed to cold temperatures
  11. vomiting

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.