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 or nurse immediately if any of the following side effects occur:

More common

  1. Black, tarry stools
  2. blood in the urine
  3. chills
  4. cough
  5. diarrhea
  6. dizziness
  7. faintness, or lightheadedness when getting up suddenly from a lying or sitting position
  8. fast heartbeat
  9. fever
  10. headache
  11. itching, hives, skin rash
  12. nausea
  13. painful or difficult urination
  14. pale skin
  15. sore throat
  16. sores, ulcers, or white spots on the lips or in the mouth
  17. sweating
  18. swollen glands
  19. tightness in the chest
  20. troubled breathing, exertional
  21. unusual bleeding or bruising
  22. unusual tiredness or weakness
  23. vomiting

Less common

  1. Bloating or swelling of the face, hands, lower legs, or feet
  2. chest pain
  3. hoarseness
  4. lower back or side pain
  5. muscle weakness
  6. painful cold sores or blisters on the lips, nose, eyes, or genitals
  7. pounding or irregular heartbeat or pulse
  8. rapid weight gain
  9. red or purple spots on the skin, varying in size and remaining after pushing the skin surface
  10. tremor
  11. unexplained nosebleeds

Rare

  1. Bloody nose
  2. flushing of the face or neck
  3. swelling of the eyelids, face, or lips
  4. white patches on the tongue, in the mouth, or in the folds of the skin, including the genitals

Incidence not known

  1. Back pain
  2. blindness
  3. blurred or double vision
  4. chest discomfort
  5. confusion
  6. dark urine
  7. decreased urine output
  8. decreased vision
  9. difficulty in speaking
  10. dilated neck veins
  11. drowsiness
  12. extreme tiredness or weakness
  13. eye pain
  14. feeling of discomfort
  15. general feeling of tiredness and weakness
  16. inability to move the arms, legs, or facial muscles
  17. inability to speak
  18. irregular breathing
  19. joint pain, stiffness, or swelling
  20. light-colored stools
  21. muscle aches or pain
  22. numbness, pain, tingling, or weakness
  23. painful glands
  24. seizures
  25. slow speech
  26. spitting up blood
  27. sudden numbness and weakness in the arms and legs
  28. swelling of the face, fingers, feet, or lower legs
  29. upper right abdominal or stomach pain
  30. yellow eyes and 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:

More common

  1. Fear or nervousness
  2. trouble sleeping

Less common

  1. Belching
  2. bone pain
  3. burning, crawling, itching, numbness, prickling, “pins and needles”, or tingling feelings
  4. heartburn
  5. indigestion
  6. lack or loss of strength
  7. loss of appetite
  8. stomach discomfort, upset, or pain
  9. swelling or inflammation of the mouth
  10. weight loss

Rare

  1. Constipation
  2. sensation of temperature change
  3. sleepiness
  4. stuffy nose

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.