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:
Incidence not known- Absence of or decrease in body movement
- Actions that are out of control
- Agitation
- Anxiety
- Black, tarry stools
- Bleeding gums
- Blood in the urine or stools
- Burning, crawling, itching, numbness, prickling, "pins and needles", or tingling feelings
- Chest pain
- Chills
- Coma
- Confusion
- Confusion about identity, place, and time
- Cough or hoarseness
- Dark urine
- Decrease in frequency of urination
- Decrease in urine volume
- Depression
- Difficulty in passing urine (dribbling)
- Dizziness
- Dry mouth
- Fast, irregular, pounding, or racing heartbeat or pulse
- Fever
- Fever with or without chills
- General feeling of tiredness or weakness
- Headache
- Hostility
- Hyperventilation
- Increased need to urinate
- Irregular heartbeats
- Irritability
- Lethargy
- Light-colored stools
- Longer than usual time to ejaculation of semen
- Loss of bladder control
- Lower back or side pain
- Muscle twitching
- Nausea and vomiting
- Nervousness
- Painful or difficult urination
- Pale skin
- Passing urine more often
- Pinpoint red spots on the skin
- Rapid weight gain
- Restlessness
- Seizures
- Shakiness and unsteady walk
- Shortness of breath
- Sore throat
- Sores, ulcers, or white spots on the lips or in the mouth
- Stupor
- Sudden jerky movements of the body
- Swelling
- Swelling of the face, ankles, or hands
- Swollen glands
- Talking, feeling, and acting with excitement
- Trouble with sleeping
- Troubled breathing with exertion
- Unsteadiness, trembling, or other problems with muscle control or coordination
- Unusual bleeding or bruising
- Unusual tiredness or weakness
- Upper right abdominal pain
- 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:
Incidence not known- Abdominal or stomach pain
- Blurred vision
- Constipation
- Continuing ringing or buzzing or other unexplained noise in the ears
- Decreased interest in sexual intercourse
- Diarrhea
- Drowsiness
- Dry mouth
- Hair loss or thinning of the hair
- Hearing loss
- Hives or welts
- Inability to have or keep an erection
- Itching
- Loss in sexual ability, desire, drive, or performance
- Loss of appetite
- Memory loss
- Muscle spasm
- Redness of the skin
- Skin rash
- Sleeplessness
- Unable to sleep
- Weakness
- 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