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. Bladder pain
  2. bloody or cloudy urine
  3. body aches or pain
  4. chills
  5. cough
  6. difficult, burning, or painful urination
  7. difficulty with breathing
  8. fever
  9. headache
  10. loss of voice
  11. lower back or side pain
  12. muscle aches
  13. unusual tiredness or weakness

Rare

  1. Anxiety
  2. being forgetful or confused
  3. clumsiness or unsteadiness
  4. drowsiness
  5. fast or irregular heartbeat
  6. feeling drunk
  7. irritability or restlessness
  8. joint pain, stiffness, or swelling
  9. pale or blue lips, fingernails, or skin
  10. rash, hives, or itching
  11. seizures
  12. sensation of heaviness
  13. shakiness or trembling
  14. slurred speech
  15. swelling of the eyelids, face, lips, hands, or feet
  16. tightness in the chest
  17. trouble with speaking or hoarseness
  18. troubled swallowing

Incidence not known

  1. Agitation
  2. changes in behavior
  3. confusion
  4. darkening of the skin
  5. diarrhea
  6. dizziness
  7. fainting
  8. large, hive-like swelling on the face, eyelids, lips, tongue, throat, hands, legs, feet, or genitals
  9. loss of appetite
  10. mental depression
  11. nausea
  12. overactive reflexes
  13. poor coordination
  14. seeing, hearing, or feeling things that are not there
  15. shivering
  16. sweating
  17. talking or acting with excitement you cannot control
  18. thoughts of killing oneself
  19. trembling or shaking
  20. twitching
  21. vomiting

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

Less common

  1. Abnormal dreams
  2. heartburn or indigestion
  3. muscle pain or stiffness
  4. redness of the face, neck, arms, and occasionally, upper chest
  5. stomach discomfort, upset, or pain
  6. unusual drowsiness, dullness, tiredness, weakness, or feeling of sluggishness

Rare

  1. Change in vision

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.