haloperidol vs tetrabenazine
Side-by-side comparison of haloperidol and tetrabenazine. Data from FDA drug databases (Orange Book, NDC Directory, recalls, shortages) covering 20,000+ approved drugs, plus CMS pricing; see our methodology.
moderate Known Drug Interaction
7.5 Drugs That Cause QTc Prolongation Tetrabenazine causes a small prolongation of QTc (about 8 msec), concomitant use with other drugs that are known to cause QTc prolongation should be avoided, these including antipsychotic medications (e.g., chlorpromazine, haloperidol, thioridazine, ziprasidone), antibiotics (e.g., moxifloxacin), Class 1A (e.g., quinidine, procainamide) and Class III (e.g., amiodarone, sotalol) antiarrhythmic medications or any other medications known to prolong the QTc interval. 7.6 Neuroleptic Drugs The risk for Parkinsonism, NMS, and akathisia may be increased by...
Recommendation: This combination should be avoided because it can lead to heart problems and serious muscle reactions.
Haldol
Xenazine
Haloperidol is a medicine used to treat mental disorders. It can help reduce symptoms like hallucinations and confused thinking.
Tetrabenazine is a medicine used to treat chorea (uncontrollable movements) caused by Huntington's disease. It helps to reduce these movements.
Haloperidol is used to manage symptoms of psychotic disorders. It can also control tics and vocal sounds in people with Tourette's Disorder. In children, it can treat severe behavior problems like being combative or overly excitable when other treatments haven't worked. It can also be used short-term for hyperactive children with impulsivity and difficulty paying attention.
Tetrabenazine is used to treat chorea, which are the involuntary, jerky movements that happen with Huntington's disease. Huntington's disease is a brain disorder that affects movement, behavior, and thinking. This medicine can help control the movements caused by this condition.
Haloperidol works by changing the effect of certain natural chemicals in the brain. These chemicals, called neurotransmitters, affect mood and behavior. By blocking dopamine, haloperidol helps to reduce psychotic symptoms.
Tetrabenazine works by affecting a substance in the brain that moves other chemicals. It lowers the amount of certain chemicals, like dopamine, in the brain. This helps to control the involuntary movements (chorea) caused by Huntington's disease.
- • Muscle stiffness
- • Shaking
- • Slow movement
- • Restlessness
- • Changes in heart rhythm
- • Feeling sleepy or drowsy
- • Feeling tired
- • Trouble sleeping
- • Feeling depressed
- • Feeling restless
- The medicine is interacting with another medicine 1,663
- A rare, life-threatening reaction to the drug 1,577
- Weight gain 1,216
- Movement problems 1,200
- Poisoning from different substances 999
- Death 1,212
- Feeling sad or hopeless 475
- Feeling sleepy or drowsy 451
- Feeling tired 360
- Falling down 316
Haloperidol may increase the risk of death in elderly patients with dementia-related psychosis. Haloperidol is not approved to treat dementia-related psychosis.
Tetrabenazine can increase the risk of depression and suicidal thoughts in people with Huntington's disease. If you have thoughts of harming yourself, tell your doctor right away. You should not take this medicine if you are actively suicidal or have untreated depression.
Tell your doctor if you are pregnant or plan to become pregnant. Haloperidol may cause side effects in newborns if taken during pregnancy. Talk to your doctor about the risks and benefits of taking haloperidol while breastfeeding.
This medicine may harm your unborn baby. Talk to your doctor if you are pregnant or plan to become pregnant. It is not known if this medicine passes into breast milk, so talk to your doctor if you are breastfeeding.
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How to Read This haloperidol vs tetrabenazine Comparison
haloperidol is classified in the Typical Antipsychotic drug class, while tetrabenazine sits within the VMAT2 Inhibitor class. Drugs from different classes work through distinct mechanisms, so a head-to-head comparison illustrates trade-offs rather than equivalence. Both drugs are prescription-only, so a licensed provider must authorize use.
Adverse event totals above are pulled from the FDA's Adverse Event Reporting System (FAERS). For these top-ranked reactions alone, haloperidol has 6,655 submissions while tetrabenazine has 2,814. Those figures reflect cumulative reporting volume, not per-patient risk, so older, widely dispensed drugs typically look worse on count alone. These two drugs have a known moderate interaction flagged in FDA labeling, attributed to combining these drugs increases the risk of heart rhythm changes and severe movement disorders like parkinsonism.. Serious warnings, pregnancy guidance, and contraindications can differ even when indications overlap.
A table cannot substitute for clinical judgment. Effectiveness, tolerability, drug-drug interactions with your other medications, kidney and liver function, pregnancy status, insurance formulary, and price all feed into a decision that only a licensed prescriber can make responsibly. Data here is sourced from FDA Structured Product Labels (SPL) and FAERS, both of which update as manufacturers and clinicians submit new information. This page is for educational purposes only, is not medical advice, and should not be used to self-switch between haloperidol and tetrabenazine - always consult your physician or pharmacist first.
Important: This comparison is for informational purposes only. Drug effects vary between individuals. Always consult your doctor or pharmacist for personalized medical advice.