What should I watch for?
Visit your doctor or health care professional for regular checks on your progress. Ask your doctor or health care professional if you should check your blood pressure regularly, especially if you get severe headaches. Report changes in blood pressure if they occur. Contact your doctor or health care professional promptly if you develop an unusual or severe headache or have changes in your vision.
If you stop taking this medicine when it is being used for tumor treatment, the tumor may regrow quickly, and your original symptoms may return. Do not stop taking this medicine unless your doctor tells you to.
You may get dizzy or drowsy. Do not drive, use machinery, or do anything that requires mental alertness until you know how this medicine affects you. To reduce the risk of dizzy or fainting spells, do not stand or sit up quickly, especially if you are an older patient. Alcohol can make you more dizzy, and increase flushing and rapid heartbeats. Avoid alcoholic drinks. Dizziness is more common after the first dose. Take it before bedtime if possible and be careful getting out of bed.
If you find that you have sudden feelings of wanting to sleep during normal activities, like cooking, watching television, or while driving or riding in a car, you should contact your health care professional.
Your mouth may get dry. Chewing sugarless gum or sucking hard candy, and drinking plenty of water may help. Contact your doctor if the problem does not go away or is severe.
Common and Rare 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:
Dizziness or lightheadedness, especially when getting up from a lying or sitting position
Less common—reported more often in patients with Parkinson's disease
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
Rare—reported more often in patients taking large doses
Increased frequency of urination
loss of appetite, continuing
lower back pain
runny nose, continuing
stomach pain, continuing or severe
Black, tarry stools
severe chest pain
vomiting, continuing or severe
Incidence not known
blue or pale skin
chest pain, possibly moving to the left arm, neck, or shoulder
difficulty in breathing
difficulty in speaking
false beliefs that cannot be changed by facts
high or low blood pressure
inability to move the arms, legs, or facial muscles
inability to speak
increased frequency of urination
loss of bladder control
lower back pain
severe muscle stiffness
troubled or quick, shallow breathing
unusual tiredness or weakness
unusually pale 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:
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.