Side Effects

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. Blurred vision
  2. burning, crawling, itching, numbness, prickling, "pins and needles", or tingling feelings
  3. confusion
  4. difficult breathing
  5. dizziness
  6. dizziness, faintness, or lightheadedness when getting up suddenly from a lying or sitting position
  7. fainting
  8. fast or irregular heartbeat
  9. nausea or vomiting
  10. nervousness
  11. numbness or tingling in the hands, feet, or lips
  12. stomach pain
  13. sweating
  14. unusual tiredness or weakness
  15. weakness or heaviness of the legs

Incidence not known

  1. Black, tarry stools
  2. bleeding gums
  3. blood in the urine or stools
  4. coma
  5. convulsions
  6. cough
  7. decreased urine output
  8. difficulty swallowing
  9. headache
  10. hives, itching, skin rash
  11. increased thirst
  12. large, hive-like swelling on the face, eyelids, lips, tongue, throat, hands, legs, feet, or sex organs
  13. muscle pain or cramps
  14. pinpoint red spots on the skin
  15. puffiness or swelling of the eyelids or around the eyes, face, lips, or tongue
  16. tightness in the chest
  17. unusual bleeding or bruising

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. Body aches or pain
  2. chills
  3. continuing ringing or buzzing or other unexplained noise in the ears
  4. decreased interest in sexual intercourse
  5. difficulty having a bowel movement (stool)
  6. ear congestion
  7. feeling of constant movement of self or surroundings
  8. feeling sad or empty
  9. headache, severe and throbbing
  10. hearing loss
  11. inability to have or keep an erection
  12. increased sensitivity of the skin to sunlight
  13. irritability
  14. lack of appetite
  15. loss in sexual ability, desire, drive, or performance
  16. loss of interest or pleasure
  17. loss of voice
  18. redness or other discoloration of the skin
  19. sensation of spinning
  20. severe sunburn
  21. sneezing
  22. sore throat
  23. stuffy or runny nose
  24. trouble concentrating
  25. trouble sleeping

Incidence not known

  1. Change or loss of taste
  2. dark urine
  3. general tiredness and weakness
  4. light-colored stools
  5. yellow eyes and skin

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.