Medications That Cause Dehydration: 9 Drugs That May Leave You Feeling Thirsty
Dehydration is a side effect of many medicines, and it can be serious. Medications that cause dehydration include diuretics, laxatives, and chemotherapy drugs.
haloperidol
Used for Bipolar Disorder, Schizophrenia, Tourette Syndrome
Used for Bipolar Disorder, Schizophrenia, Tourette Syndrome
Haloperidol is a typical antipsychotic used to treat several behavioral and psychiatric conditions in adults and children. This medication is taken by mouth, typically 2 to 3 times per day. Side effects of haloperidol include sleepiness, dizziness, and dry mouth.
What is Haloperidol?
What is Haloperidol used for?
- Psychotic and behavioral disorders
- Tourette syndrome in adults and children
- Hyperactivity in children
How Haloperidol works
Haloperidol is a typical antipsychotic. It works by blocking the activity of dopamine, a chemical involved with mood and movement, in your brain. This leads to lower dopamine levels, which causes less hallucinations (seeing things that aren't there) and delusions (beliefs in things that aren't true).
Drug facts
| Common Brands | Haldol |
|---|---|
| Drug Class | First generation (typical) antipsychotic |
| Controlled Substance Classification | Not a controlled medication |
| Generic Status | Lower-cost generic available |
| Availability | Prescription only |
Side effects of Haloperidol
The following side effects may get better over time as your body gets used to the medication. Let your healthcare provider know immediately if you continue to experience these symptoms or if they worsen over time.
Common Side Effects
- Drowsiness
- Headache
- Tremor
- Muscle spasms
- Abnormal muscle movement
- Mood changes (anxiety, depression)
- Trouble sleeping
- Restlessness
Less Common Side Effects
- Low blood pressure
- Fast heart beat
- Constipation
- Weight gain
- Irregular menstrual cycle
- Dizziness
- Blurred vision
- Dry mouth
- Excessive saliva (drooling)
- Blood sugar changes
Haloperidol serious side effects
Contact your healthcare provider immediately if you experience any of the following.
- Abnormal heart rhythm: chest pounding, short of breath, chest pain, feeling faint or lightheaded
- Neuroleptic malignant syndrome (NMS): fever, sweating, stiff muscles, confusion, not aware of your surroundings, fast or irregular heartbeat
- Low blood cell counts: fever, pale skin, fast heart rate, lightheadedness, feeling unwell
- Withdrawal: nausea, headache, sweating, trouble sleeping, mood changes
More on Haloperidol side effects
The following Haloperidol side effects have also been reported
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
Difficulty with speaking or swallowing
inability to move the eyes
loss of balance control
mask-like face
muscle spasms, especially of the neck and back
restlessness or need to keep moving (severe)
shuffling walk
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
Less common
Decreased thirst
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
skin rash
uncontrolled chewing movements
uncontrolled movements of the arms and legs
Rare
Confusion
convulsions (seizures)
difficult or fast breathing
fast heartbeat or irregular pulse
fever (high)
hot, dry skin, or lack of sweating
increased blinking or spasms of the eyelid
increased sweating
loss of bladder control
muscle stiffness (severe)
muscle weakness
sore throat and fever
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)
dizziness (severe)
drowsiness (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:
More common
Blurred vision
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.
Get your GoodRx coupon
$39.99
GoodRx discount
$10.73
Pros and cons of Haloperidol
Pros
- Available as a tablet and a liquid
- Available as a lower-cost, generic medication
- Works well to treat several behavioral and psychiatric conditions
- Can be used in children
Cons
- Can have lots of problematic side effects compared to newer antipsychotics
- Needs to be taken two to three times per day
- Can cause dangerous withdrawal symptoms if suddenly stopped
- Might cause drowsiness, which can affect normal daily activities
Pharmacist tips for Haloperidol
- You can take haloperidol with or without food. But if it's hurting your stomach, try taking it with food to help.
- Use a medication dose cup or syringe to measure your dose of haloperidol if you're using the liquid. Don't use household measuring spoons because they aren't accurate and might cause you to take the wrong dose.
- Haloperidol can make you sleepy. Don't drive or do anything requiring concentration until you know how this medication affects you.
- Don't drink alcohol while taking haloperidol because it can make you sleepier, drop your blood pressure, and raise your risk of accidental injuries.
- It might take some time before you find the dose that works best for you. Don't stop taking haloperidol without talking to your provider first, even if you don't feel better.
- If you've taken haloperidol for a long time, don't stop taking it suddenly without talking to your provider first. Doing so can result in serious withdrawal symptoms, such as nausea, headache, sweating, sleeping problems, or mood changes (e.g., anxiety, depression). It might also cause an imbalance of chemicals in your brain that can make your psychotic symptoms come back. Work with your provider to lower you dose gradually to stop haloperidol safely and prevent these symptoms from happening.
- Taking haloperidol can make you more sensitive to certain medications, such as barbiturates (e.g., phenobarbital), sedatives, opioid pain medications (e.g., morphine), and antihistamines (e.g., diphenhydramine (Benadryl)). Taking haloperidol with these medications can raise your risk of side effects. Let your provider know about all the medications you're taking before starting haloperidol.
- There have been reports of people feeling weakness, fever, confusion, and uncontrollable muscle contractions and movements when taking lithium (Lithobid) and haloperidol together. Let your provider know if you're taking lithium and if you get any of these side effects while taking both medications.
Risks and warnings for Haloperidol
Haloperidol can cause some serious health issues. This risk may be even higher for certain groups. If this worries you, talk to your doctor or pharmacist about other options.
Higher risk of death in older people with dementia-related psychosis
- Risk factors: Age 65 and older with dementia and psychosis
People 65 years and older with dementia sometimes have delusions and hallucinations (believing, seeing, or hearing things that aren't real). This is called dementia-related psychosis. Older people with dementia-related psychosis have a higher risk of death if they take medications like haloperidol. Because of this risk, haloperidol shouldn't be used in people 65 years and older with dementia-related psychosis. Let your provider know if you or someone you know has dementia before starting haloperidol.
In addition, older patients with dementia-related psychosis treated with some antipsychotics had a higher risk of stroke. Seek medical help immediately if you experience sudden numbness in your face, arms, or legs (especially on one side of your body), or if you have sudden trouble speaking, seeing, walking, or understanding people.
Life-threatening abnormal heart rhythm (QT prolongation)
- Risk factors: Low potassium or magnesium blood levels | Older age | Using other medications that cause QT prolongation | Born with QT prolongation | Hypothyroidism (low thyroid hormone) | History of heart problems or abnormal heart rhythms (arrhythmias) | Slow heart rate
Although rare, haloperidol can affect your heart rhythm by prolonging the time period from when the heart pumps and then relaxes. This is known as QT prolongation and it can be life-threatening. Your risk for QT prolongation is higher if you have any of the risk factors listed above. Depending on your risks for QT prolongation, your provider might check your heart rhythm from time to time with an electrocardiogram (EKG). People who were born with QT prolongation or have a history of arrhythmias should avoid taking haloperidol. If you feel your chest pounding, have trouble breathing, chest pain, or feel lightheaded while taking haloperidol, call 911 right away.
Difficulty controlling body movements
- Risk factors: Taking other antipsychotic medications | Older age | Female sex | High dose | Taking haloperidol for a long period of time | Parkinson's disease | Lewy body dementia
Antipsychotic medications like haloperidol can cause uncontrolled body movements, such as eye-twitching or lip-smacking. Your risk of this happening is more likely the longer you take medications like haloperidol and if you're taking a higher dose. If you have Parkinson's disease or certain types of dementia, your risk is higher and you shouldn't take haloperidol. These movement problems can become permanent. If you experience any uncontrolled movements and aren't able to stop them, talk to your provider right away.
Neuroleptic malignant syndrome (NMS)
- Risk factors: Taking antipsychotic medications
Taking antipsychotic medications like haloperidol can cause a rare, but life-threatening condition called neuroleptic malignant syndrome (NMS). Symptoms include fever, sweating, stiff muscles, confusion, not aware of your surroundings, and fast or irregular heartbeat. If you experience any of these symptoms while taking haloperidol, seek medication attention as soon as possible. You provider will likely have you stop taking haloperidol and switch you to something else.
Higher risk of falls
- Risk factors: Low blood pressure | Taking medications that lower blood pressure | History of medical conditions that can lower blood pressure
Haloperidol can make you tired, lower your blood pressure, or cause you to lose your balance, which can lead to falls and injuries. When standing from a sitting or lying position, make sure to get up slowly and hold onto something. If you have concerns, speak to your provider.
Pneumonia
- Risk factors: Older age | Breathing problems | Smoker
Some cases of bronchopneumonia, a type of infection in your lungs where your lungs get inflamed, have been reported after using antipsychotics like haloperidol. Your risk is higher if you're older in age, smoke, or have breathing problems. Seek medical attention immediately if you experience a fever, cough, or trouble breathing.
Low white blood cell counts
- Risk factors: History of low blood cell counts
Though not common, haloperidol can lower your white blood cell counts, especially if they've been low previously from other conditions. This can raise your risk of serious infection. You'll need to get blood tests done regularly during the first few months of taking haloperidol so your provider can make sure your blood cell counts are in the normal range. If your blood counts drop too low, you'll likely need to stop taking haloperidol. If you develop any signs of infection, such as fever, tiredness, chills, cough, or trouble breathing, and they don't go away, contact your provider right away.
Harm to unborn babies
Haloperidol should only be used in pregnancy if the benefits outweigh the potential risks to your unborn baby. Newborn babies exposed to haloperidol during the third trimester of pregnancy are at a higher risk for side effects and withdrawal symptoms following delivery. Let your healthcare provider know if you're pregnant or plan to become pregnant while taking haloperidol.
More on Haloperidol warnings
Haloperidol dosage
The average cost for 30 tablets of 5mg of Haloperidol is $12.36 with a free GoodRx coupon. This is 55.67% off the average retail price of $27.88. 
Bottle of oral concentrate
Bottle of oral concentrate| Dosage | Quantity | Price as low as | Price per unit |
|---|---|---|---|
| 15ml of 2mg/ml | 1 bottle | $10.73 | $10.73 |
Typical dosage for Haloperidol
Haloperidol is available as tablets and a liquid. The dosing is the same for both the tablets and liquid.
-
Adults:
- Moderate symptoms: The typical starting dose is 0.5 mg to 2 mg by mouth 2 to 3 times per day.
- Severe symptoms: The typical starting dose is 3 mg to 5 mg by mouth 2 to 3 times per day.
-
Children ages 3 to 12 years old (weight range of 15 kg to 40 kg):
- Psychotic conditions: Your child's provider will determine their dose based on your child's body weight. The typical dose is 0.05 mg/kg to 0.15 mg/kg by mouth per day, split into 2 or 3 smaller doses and taken throughout the day.
- Non-psychotic behavior conditions and Tourette syndrome: Your child's provider will determine their dose based on your child's body weight. The typical dose is 0.05 mg/kg to 0.075 mg/kg by mouth per day, split into 2 or 3 smaller doses and taken by mouth throughout the day.
Your provider will adjust the dose based on your or your child's response to the medication and if you're having side effects.
More on Haloperidol dosage
Interactions between Haloperidol and other drugs
Haloperidol may interact with certain medications or supplements. Always let your doctor and pharmacist know about any other medications or supplements (including prescribed and over-the-counter medications, vitamins, and dietary or herbal supplements) that you are currently taking. The list below does not include all possible drug interactions with Haloperidol. Please note that only the generic name of each medication is listed below.
Although certain medicines should not be used together at all, in other cases two different medicines may be used together even if an interaction might occur. In these cases, your doctor may want to change the dose, or other precautions may be necessary. When you are taking this medicine, it is especially important that your healthcare professional know if you are taking any of the medicines listed below. The following interactions have been selected on the basis of their potential significance and are not necessarily all-inclusive.
Using this medicine with any of the following medicines is not recommended. Your doctor may decide not to treat you with this medication or change some of the other medicines you take.
- Bepridil
- Bromopride
- Cisapride
- Dronedarone
- Fluconazole
- Levomethadyl
- Mesoridazine
- Metoclopramide
- Nelfinavir
- Pimozide
- Piperaquine
- Posaconazole
- Saquinavir
- Sparfloxacin
- Terfenadine
- Thioridazine
- Ziprasidone
Using this medicine with any of the following medicines is usually not recommended, but may be required in some cases. If both medicines are prescribed together, your doctor may change the dose or how often you use one or both of the medicines.
- Abametapir
- Acecainide
- Ajmaline
- Alfentanil
- Alfuzosin
- Amiodarone
- Amisulpride
- Amitriptyline
- Anagrelide
- Apomorphine
- Aprindine
- Aripiprazole
- Aripiprazole Lauroxil
- Arsenic Trioxide
- Artemether
- Asenapine
- Astemizole
- Azimilide
- Azithromycin
- Bedaquiline
- Benzhydrocodone
- Bretylium
- Bromazepam
- Bromocriptine
- Buprenorphine
- Bupropion
- Buserelin
- Butorphanol
- Cabergoline
- Calcium Oxybate
- Cannabidiol
- Ceritinib
- Cetirizine
- Chloral Hydrate
- Chloroquine
- Chlorpromazine
- Ciprofloxacin
- Citalopram
- Clarithromycin
- Clobazam
- Clofazimine
- Clomipramine
- Clozapine
- Cobicistat
- Codeine
- Conivaptan
- Crizotinib
- Dabrafenib
- Dalfopristin
- Darunavir
- Dasatinib
- Degarelix
- Delamanid
- Desipramine
- Deslorelin
- Deutetrabenazine
- Dibenzepin
- Dihydrocodeine
- Disopyramide
- Dofetilide
- Dolasetron
- Domperidone
- Donepezil
- Doxepin
- Doxylamine
- Droperidol
- Efavirenz
- Encainide
- Encorafenib
- Enflurane
- Entrectinib
- Epinephrine
- Erythromycin
- Escitalopram
- Esketamine
- Fentanyl
- Fingolimod
- Flecainide
- Flibanserin
- Fluoxetine
- Formoterol
- Foscarnet
- Fosnetupitant
- Fostemsavir
- Gabapentin
- Gabapentin Enacarbil
- Gatifloxacin
- Gemifloxacin
- Glasdegib
- Gonadorelin
- Goserelin
- Granisetron
- Halofantrine
- Histrelin
- Hydrocodone
- Hydromorphone
- Hydroquinidine
- Hydroxychloroquine
- Hydroxyzine
- Ibutilide
- Imipramine
- Inotuzumab Ozogamicin
- Itraconazole
- Ivabradine
- Ivosidenib
- Ketamine
- Ketoconazole
- Lapatinib
- Lefamulin
- Lemborexant
- Lenvatinib
- Levocetirizine
- Levodopa
- Levofloxacin
- Levorphanol
- Lithium
- Lofexidine
- Lopinavir
- Lorcainide
- Loxapine
- Lumefantrine
- Macimorelin
- Magnesium Oxybate
- Mefloquine
- Meperidine
- Methadone
- Metronidazole
- Mifepristone
- Milnacipran
- Mirtazapine
- Morphine
- Morphine Sulfate Liposome
- Moxifloxacin
- Nafarelin
- Nalbuphine
- Netupitant
- Nilotinib
- Norfloxacin
- Nortriptyline
- Octreotide
- Ofloxacin
- Ondansetron
- Osilodrostat
- Osimertinib
- Oxaliplatin
- Oxycodone
- Oxymorphone
- Ozanimod
- Paliperidone
- Panobinostat
- Paroxetine
- Pasireotide
- Pazopanib
- Pentamidine
- Pentazocine
- Pergolide
- Periciazine
- Pimavanserin
- Pitolisant
- Pixantrone
- Ponesimod
- Potassium Oxybate
- Pramipexole
- Pregabalin
- Probucol
- Procainamide
- Prochlorperazine
- Promethazine
- Propafenone
- Propranolol
- Protriptyline
- Quetiapine
- Quinidine
- Quinine
- Quinupristin
- Ranolazine
- Remifentanil
- Remimazolam
- Ribociclib
- Risperidone
- Ropinirole
- Rotigotine
- Selegiline
- Selpercatinib
- Sematilide
- Sertindole
- Sertraline
- Sevoflurane
- Siponimod
- Sodium Oxybate
- Sodium Phosphate
- Sodium Phosphate, Dibasic
- Sodium Phosphate, Monobasic
- Solifenacin
- Sorafenib
- Sotalol
- Spiramycin
- Sufentanil
- Sulfamethoxazole
- Sulpiride
- Sultopride
- Sunitinib
- Tacrolimus
- Tapentadol
- Tedisamil
- Telavancin
- Telithromycin
- Tetrabenazine
- Toremifene
- Tramadol
- Trazodone
- Triclabendazole
- Trifluoperazine
- Trimethoprim
- Trimipramine
- Triptorelin
- Vandetanib
- Vardenafil
- Vemurafenib
- Venlafaxine
- Vinflunine
- Voclosporin
- Voriconazole
- Zotepine
- Zuclopenthixol
Using this medicine with any of the following medicines may cause an increased risk of certain side effects, but using both drugs may be the best treatment for you. If both medicines are prescribed together, your doctor may change the dose or how often you use one or both of the medicines.
- Benztropine
- Betel Nut
- Buspirone
- Carbamazepine
- Dextromethorphan
- Fluvoxamine
- Methyldopa
- Nefazodone
- Olanzapine
- Procyclidine
- Rifampin
- Rifapentine
- Tacrine
- Trihexyphenidyl
How much does Haloperidol cost?
To access savings, use a GoodRx coupon and pay just a fraction of the retail price.
Haloperidol (generic)
$10.73
Haloperidol contraindications
Contraindications are specific health conditions or situations in which a person should not take a medication due to safety concerns. If you have any of the following conditions or if any of the following apply to you, let your healthcare provider know because Haloperidol will not be safe for you to take.
- Severe central nervous system depression (e.g., slowed breathing, slurred speech, slowed reflexes, confusion)
- Coma
- Parkinson's disease
What are alternatives to Haloperidol?
There are a number of medications that your doctor can prescribe in place of Haloperidol. Compare a few possible alternatives below.
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Haloperidol images
