Side Effects
Drug information provided by: Merative, Micromedex®
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 or nurse immediately if any of the following side effects occur:
More common
Haloperidol®
-
Excessive muscle tone
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inability to move the eyes
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increase in body movements
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increased blinking or spasms of the eyelid
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muscle stiffness, tension, or tightness
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sleepiness or unusual drowsiness
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sticking out of the tongue
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tremor
-
trouble with breathing, speaking, or swallowing
-
uncontrolled twisting movements of the neck, trunk, arms, or legs
-
unusual facial expressions
Haloperidol® Decanoate
-
Difficulty swallowing
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fixed position of the eye
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loss of balance control
-
mask-like face
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shuffling walk
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slowed movements
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slurred speech
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stiffness of the arms and legs
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tic-like or jerky movements of the head, face, mouth, and neck
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trembling and shaking of the fingers and hands
Less common
Haloperidol®
-
Slow movement and reflexes
Haloperidol® Decanoate
-
Absence of or decrease in body movement
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inability to sit still
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need to keep moving
-
restlessness
Rare (both)
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Blurred vision
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confusion
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difficulty opening the mouth
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dizziness
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dizziness, faintness, or lightheadedness when getting up suddenly from a lying or sitting position
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fainting
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fast, pounding, or irregular heartbeat or pulse
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high fever
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high or low blood pressure
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increased sweating
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lightheadedness
-
lockjaw
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loss of bladder control
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muscle spasm, especially of the neck and back
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muscle twitching
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seizures
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severe muscle stiffness
-
uncontrolled eye movements
-
unusual tiredness or weakness
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unusually pale skin
Incidence not known (both)
-
Anxiety
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black, tarry stools
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bleeding, blistering, burning, coldness, discoloration of the skin, feeling of pressure, hives, infection, inflammation, itching, lumps, numbness, pain, rash, redness, scarring, soreness, stinging, swelling, tenderness, tingling, or warmth at the injection site
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chest pain or tightness
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chills
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clay-colored stools
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cold sweats
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continuing nausea or vomiting
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cool, pale skin
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cough
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dark urine
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decrease in the frequency of urination
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deep or fast breathing with dizziness
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depression
-
difficulty in passing urine (dribbling)
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drooling
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dry mouth
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eye pain
-
false or unusual sense of well-being
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fever with or without chills
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flushed, dry skin
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fruit-like breath odor
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general feeling of illness, tiredness, or weakness
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headache
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hoarseness
-
hot, dry skin
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increase in the frequency of seizures
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increased hunger
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increased thirst
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increased urination
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irregular heartbeat, recurrent
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irritability
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itching, skin rash
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lack of sweating
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large, hive-like swelling on the face, eyelids, lips, tongue, throat, hands, legs, feet, or genitals
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lip smacking or puckering
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loss of appetite
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loss of consciousness
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lower back or side pain
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muscle weakness
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muscle pain or cramps
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muscle trembling or jerking
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nausea
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nervousness
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nightmares
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noisy breathing
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numbness of the feet, hands, and around the mouth
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painful or difficult urination
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pale skin
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pounding in the ears
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puffing of the cheeks
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rapid or worm-like movements of the tongue
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shakiness
-
shuffling walk
-
sore throat
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sores, ulcers, or white spots on the lips or in the mouth
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stomach pain
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swelling of the face, ankles, or hands
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swollen glands
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total body jerking
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trouble breathing
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trouble with sleeping
-
twisting movements of the body
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uncontrolled chewing movements
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unexplained weight loss
-
unpleasant breath odor
-
unusual bleeding or bruising
-
unusual dullness, tiredness, weakness, or feeling of sluggishness
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vomiting
-
vomiting of blood
-
weakness of the arms and legs
-
yellow eyes or 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:
Less common
Haloperidol®
-
Constipation
-
increased watering of the mouth
Rare (both)
-
Absent, missed, or irregular menstrual periods
-
acne, pimples
-
breast discomfort
-
cramps
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decreased interest in sexual intercourse
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heavy bleeding
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inability to have or keep an erection
-
increased weight
-
loss in sexual ability, desire, drive, or performance
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medium to heavy, irregular vaginal bleeding between regular monthly periods, which may require the use of a pad or a tampon
-
stopping of menstrual bleeding
-
swelling of the breasts or unusual milk production
Incidence not known (both)
-
Belching
-
blindness
-
changes in vision
-
decreased vision
-
difficulty having a bowel movement
-
disturbed color perception
-
double vision
-
drowsiness
-
feeling of constant movement of self or surroundings
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fullness or swelling of the breasts
-
halos around lights
-
heartburn
-
increased in sexual ability, desire, drive, or performance
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increased interest in sexual intercourse
-
increased sensitivity of the skin to sunlight
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indigestion
-
loss of hair
-
night blindness
-
overbright appearance of lights
-
pain or tenderness of the breasts
-
painful or prolonged erection of the penis
-
redness or other discoloration of the skin
-
sensation of spinning
-
severe sunburn
-
stomach discomfort or upset
-
tunnel vision
-
weight loss
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.
Portions of this document last updated: Sept. 01, 2024
Copyright: © Merative US L.P. 1973, 2024. All rights reserved. Information is for End User's use only and may not be sold, redistributed or otherwise used for commercial purposes.