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- Back, leg, or stomach pains
- Bleeding gums
- Chills
- Dark urine
- Difficulty with breathing
- Fever
- General body swelling
- Headache
- Loss of appetite
- Nausea or vomiting
- Nosebleeds
- Pale skin
- Sore throat
- Unusual tiredness or weakness
- Yellowing of the eyes or skin
- Abdominal or stomach tenderness
- Black, tarry stools
- Blood in the urine or stools
- Bluish color
- Changes in skin color
- Chest pain or discomfort
- Confusion
- Convulsions
- Cough
- Decreased frequency or amount of urine
- Diarrhea
- Difficulty with swallowing
- Dizziness
- Dry mouth
- Fast, irregular, pounding, or racing heartbeat or pulse
- General tiredness and weakness
- Hives
- Increased blood pressure
- Increased thirst
- Itching
- Light-colored stools
- Lightheadedness, dizziness, or fainting
- Lower back or side pain
- Mood changes
- Muscle pain or cramps
- Nervousness
- Numbness or tingling in the hands, feet, or lips
- Painful or difficult urination
- Pinpoint red spots on the skin
- Puffiness or swelling of the eyelids or around the eyes, face, lips, or tongue
- Severe abdominal or stomach cramps and pain
- Shortness of breath
- Skin itching, rash, or redness
- Slow or irregular heartbeat
- Sores, ulcers, or white spots on the lips or in the mouth
- Swelling of the face, throat, fingers, or lower legs
- Swollen glands
- Tenderness
- Tightness in the chest
- Troubled breathing
- Troubled breathing with exertion
- Unusual bleeding or bruising
- Upper right abdominal or stomach pain
- Watery and severe diarrhea, which may also be bloody
- Weakness or heaviness of the legs
- Weight gain
- Wheezing
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- Blurred vision
- Difficulty having a bowel movement (stool)
- Flushed, dry skin fruit-like breath odor
- Hives or welts
- Increased hunger
- Increased urination
- Sweating
- Unexplained weight loss
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.


Find Mayo Clinic on