What should I watch for?
Visit your doctor or health care professional for regular checks on your progress. It may be several weeks before you see the full effects of this medicine. Do not stop taking this medicine suddenly. You may need to gradually reduce the dose. Only stop taking this medicine on advice of your doctor or health care professional.
You may get drowsy or dizzy. Do not drive, use machinery, or do anything that needs mental alertness until you know how this medicine affects you. Do not stand or sit up quickly, especially if you are an older patient. This reduces the risk of dizzy or fainting spells. Alcohol can increase dizziness and drowsiness. Avoid alcoholic drinks.
Do not drink grapefruit juice products while taking this medicine. This can increase the chance of developing serious heart problems.
This medicine can reduce the response of your body to heat or cold. Dress warm in cold weather and stay hydrated in hot weather. If possible, avoid extreme temperatures like saunas, hot tubs, very hot or cold showers, or activities that can cause dehydration such as vigorous exercise.
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:
Difficulty with speaking
dizziness or fainting
fast or irregular heartbeat
lack of facial expression
loss of balance control
mood or behavior changes
restlessness or need to keep moving
stiffness of the arms and legs
swelling or soreness of the breasts (less common in males)
trembling and shaking of the fingers and hands
unusual secretion of milk (rare in males)
Less common or rare
Difficulty with swallowing
inability to move the eyes
increased blinking or spasms of the eyelid
lip smacking or puckering
muscle spasms, especially of the face, neck, or back
puffing of the cheeks
rapid or worm-like movements of the tongue
skin rash and itching
swelling of the face
uncontrolled chewing movements
uncontrolled movements of the neck, trunk, arms, or legs, including twisting movements
unusual bleeding or bruising
unusual facial expressions or body positions
yellow eyes or skin
difficult or unusually fast breathing
fast heartbeat or irregular pulse
high or low (irregular) blood pressure
loss of bladder control
muscle stiffness (severe)
Get emergency help immediately if any of the following symptoms of overdose occur:
Symptoms of overdose
muscle trembling, jerking, or stiffness (severe)
troubled breathing (severe)
uncontrolled movements (severe)
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:
Blurred vision or other vision problems
dizziness, lightheadedness, or fainting when getting up from a lying or sitting position
dryness of the mouth
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.