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 as soon as possible if any of the following side effects occur:

More common

  1. Abnormal thinking: holding false beliefs that cannot be changed by fact
  2. agitation
  3. anxiety
  4. clenching or grinding of teeth
  5. clumsiness or unsteadiness
  6. confusion
  7. difficulty swallowing
  8. dizziness
  9. excessive watering of mouth
  10. false sense of well being
  11. feeling faint
  12. general feeling of discomfort or illness
  13. hallucinations (seeing, hearing, or feeling things that are not there)
  14. hand tremor, increased
  15. nausea or vomiting
  16. numbness
  17. unusual and uncontrolled movements of the body, including the face, tongue, arms, hands, head, and upper body
  18. unusual tiredness or weakness

Less common

  1. Blurred vision
  2. difficult urination
  3. difficulty opening mouth
  4. dilated (large) pupils
  5. dizziness or lightheadedness when getting up from a lying or sitting position
  6. double vision
  7. fast, irregular, or pounding heartbeat
  8. hot flashes
  9. increased blinking or spasm of eyelids
  10. loss of bladder control
  11. mental depression
  12. other mood or mental changes
  13. skin rash
  14. unusual weight gain or loss


  1. Back or leg pain
  2. bloody or black tarry stools
  3. chills
  4. convulsions (seizures)
  5. fever
  6. high blood pressure
  7. inability to move eyes
  8. loss of appetite
  9. pain, tenderness, or swelling of foot or leg
  10. pale skin
  11. prolonged, painful, inappropriate penile erection
  12. sore throat
  13. stomach pain
  14. swelling of face
  15. swelling of feet or lower legs
  16. vomiting of blood or material that looks like coffee grounds

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. Abdominal pain
  2. dryness of mouth
  3. loss of appetite
  4. nightmares
  5. passing gas

Less common

  1. Constipation
  2. diarrhea
  3. flushing of skin
  4. headache
  5. hiccups
  6. increased sweating
  7. muscle twitching
  8. trouble in sleeping

This medicine may sometimes cause the urine, saliva, and sweat to be darker in color than usual. The urine may at first be reddish, then turn to nearly black after being exposed to air. Some bathroom cleaning products will produce a similar effect when in contact with urine containing this medicine. This is to be expected during treatment with this medicine. Also, this medicine may cause a bitter taste, or a burning sensation of the tongue.

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.