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:
More common- Shakiness in the legs, arms, hands, or feet
- Trembling or shaking of the hands or feet
- Extra heartbeat
- Feeling faint, dizzy, or lightheadedness
- Feeling of warmth or heat
- Flushing or redness of the skin, especially on the face and neck
- Headache
- Sweating
- Burning, crawling, itching, numbness, prickling, "pins and needles", or tingling feelings
- Excessive muscle tone
- Muscle stiffness
- Muscle tension or tightness
Get emergency help immediately if any of the following symptoms of overdose occur:
Symptoms of overdose- Arm, back, or jaw pain
- Blurred vision
- Chest pain or discomfort
- Chest tightness or heaviness
- Confusion
- Convulsions
- Decreased urine
- Dizziness
- Dizziness, faintness, or lightheadedness when getting up suddenly from a lying or sitting position
- Dry mouth
- Fainting
- Fast, pounding, or irregular heartbeat or pulse
- General feeling of discomfort or illness
- Increased thirst
- Loss of appetite
- Mood changes
- Muscle pain or cramps
- Nausea or vomiting
- Nervousness
- Numbness or tingling in the hands, feet, or lips
- Pounding in the ears
- Seizures
- Shortness of breath
- Sleeplessness
- Slow or fast heartbeat
- Trouble sleeping
- Unable to sleep
- Unusual tiredness or weakness
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- Sleepiness or unusual drowsiness
- Anxiety
- Lack or loss of strength
- Fever
- Rash
- Redness, soreness, or itching skin
- Seeing, hearing, or feeling things that are not there
- Sores, welting, or blisters
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.


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