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:
Rare- Chest pain (severe)
- Convulsions (seizures)
- Difficulty in breathing
- Fainting
- Fast heartbeat or irregular pulse
- Headache (severe or continuing)
- High fever
- High or low (irregular) blood pressure
- Increased sweating
- Loss of bladder control
- Nausea and vomiting (continuing or severe)
- Nervousness
- Severe muscle stiffness
- Sudden weakness
- Unexplained shortness of breath
- Unusual tiredness or weakness
- Unusually pale skin
- Vision changes, such as blurred vision or temporary blindness
Check with your doctor as soon as possible if any of the following side effects occur:
More common- Anxiety
- Bloody or cloudy urine
- Confusion
- Difficult or painful urination
- Frequent urge to urinate
- Hallucinations (seeing, hearing, or feeling things that are not there)
- Uncontrolled movements of the body, such as the face, tongue, arms, hands, head, and upper body
- Dizziness
- Headache
- Swelling in hands and legs
- Abdominal pain or pressure
- Chills
- Cough
- Decreased flow of urine
- Fever
- Pain in side or lower back
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- Chest congestion
- Constipation
- Dizziness or lightheadedness, especially when getting up from a lying or sitting position
- Drowsiness
- Heartburn
- Lower back pain
- Muscle pain
- Nausea
- Runny or stuffy nose
- Trouble in sleeping
- Weakness
- Diarrhea
- Dryness of mouth
- Loss of appetite
- Swelling of the face
- Vomiting
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