Haldol Side Effects
What should I watch for?
Visit your doctor or health care professional for regular checks on your progress. It may be a few weeks before you see the full effects of this medicine.
You may get dizzy or drowsy or have blurred vision. 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.
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.
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.
This medicine can make you more sensitive to the sun. Keep out of the sun. If you cannot avoid being in the sun, wear protective clothing and use sunscreen. Do not use sun lamps or tanning beds/booths.
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 or swallowing
inability to move the eyes
loss of balance control
muscle spasms, especially of the neck and back
restlessness or need to keep moving (severe)
stiffness of the arms and legs
trembling and shaking of the fingers and hands
twisting movements of the body
weakness of the arms and legs
difficulty in urination
dizziness, lightheadedness, or fainting
hallucinations (seeing or hearing things that are not there)
lip smacking or puckering
puffing of the cheeks
rapid or worm-like movements of the tongue
uncontrolled chewing movements
uncontrolled movements of the arms and legs
difficult or fast breathing
fast heartbeat or irregular pulse
hot, dry skin, or lack of sweating
increased blinking or spasms of the eyelid
loss of bladder control
muscle stiffness (severe)
uncontrolled twisting movements of the neck, trunk, arms, or legs
unusual bleeding or bruising
unusual facial expressions or body positions
unusual tiredness or weakness
unusually pale skin
yellow eyes or skin
Incidence not known
Continuing nausea or vomiting
increase in the frequency of seizures
loss of appetite
swelling of the face
tiredness and weakness
Get emergency help immediately if any of the following symptoms of overdose occur:
Symptoms of overdose
Difficulty with breathing (severe)
muscle trembling, jerking, stiffness, or uncontrolled movements (severe)
unusual tiredness or weakness (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:
changes in menstrual period
dryness of the mouth
swelling or pain in the breasts (in females)
unusual secretion of milk
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.