Amisulpride

What Is Amisulpride?

Amisulpride is a prescription medication that belongs to a class of drugs called benzamide antipsychotics, which work by affecting dopamine activity in the brain. It also has antiemetic (anti-nausea) properties.

Amisulpride’s approved and studied uses differ significantly by country:

• In the United States, amisulpride is approved only as an intravenous (IV) medication given in a hospital or surgical setting to prevent and treat postoperative nausea and vomiting (PONV) — nausea that can occur after surgery.
• In many other countries (including the United Kingdom, much of Europe, and dozens of other nations), an oral form of amisulpride is approved and widely prescribed to treat schizophrenia, and at lower doses, certain forms of depression (dysthymia).

Available formulations include:

• Intravenous (IV) solution — the only form currently FDA-approved in the U.S., used in hospital/surgical settings
• Oral tablets (100 mg, 200 mg, 400 mg) — available and prescribed in many countries outside the U.S., not FDA-approved

Because approval status varies by country and by form, patients should always confirm with their prescribing specialist and pharmacist exactly which form and use applies to their situation.

What Is the Recommended Dosage of Amisulpride?

Dosage depends on several individual factors, including:

• The condition being treated (postoperative nausea prevention vs. other uses)
• Age
• Body weight, in some cases
• Kidney function — amisulpride is largely cleared by the kidneys, so dosing may need adjustment in patients with reduced kidney function
• Other medications being taken

Available dosage forms include IV solution (in the U.S.) and, in countries where approved, oral tablets in several strengths.

Because amisulpride’s IV use occurs in a monitored hospital setting, dosing is determined and administered directly by the treating medical team. Where oral forms are prescribed, dosing is individualized by a licensed specialist based on the condition being treated and patient-specific factors.

Amisulpride should never be dosed based on internet guidance, past prescriptions, or another person’s regimen. Always follow the exact instructions provided by the prescribing specialist.

How Amisulpride Works

Amisulpride works primarily by blocking certain dopamine receptors (D2 and D3) in the brain. Its effects depend on the dose:

• At lower doses, it appears to preferentially affect receptors that regulate dopamine release, which may help improve mood-related and motivation-related symptoms.
• At higher doses, it blocks dopamine receptors more broadly, which is thought to reduce symptoms such as hallucinations, disorganized thinking, and agitation.
• Amisulpride’s antiemetic effect (its FDA-approved use) is also linked to its action on dopamine receptors involved in triggering nausea and vomiting.

Amisulpride helps manage or prevent symptoms; it is not a cure for the underlying condition being treated, and ongoing use (where prescribed) typically requires continued specialist oversight.

Is a Prescription Required to Buy Amisulpride Online?

Yes. Amisulpride is a prescription-only medication everywhere it is approved, including its FDA-approved IV form in the United States.

• Amisulpride should only be obtained and administered through licensed medical professionals and licensed pharmacies.
• Depending on the intended use, the prescribing specialist may be:
  • An anesthesiologist or surgical team member (for prevention of postoperative nausea and vomiting)
  • A psychiatrist (in countries where oral amisulpride is approved for schizophrenia or depression)
• Patients should be cautious of any source offering amisulpride without a prescription, as counterfeit, unregulated, or non-human (veterinary-grade) products may be unsafe.
• Only licensed, verified pharmacies should be used to obtain this medication.

Side Effects of Amisulpride

Common Side Effects

• Headache
• Drowsiness or sedation
• Low blood pressure or dizziness
• Chills or shivering
• Nausea (in some cases)
• Elevated prolactin levels, which may cause hormonal symptoms (see below)

Serious Side Effects

• Irregular heart rhythm (QT prolongation), particularly in patients with existing heart conditions
• Movement-related side effects, such as muscle stiffness, tremor, or restlessness (more common at higher, antipsychotic-range doses)
• Neuroleptic malignant syndrome — a rare but serious reaction involving high fever, muscle rigidity, and confusion
• Significant drop in blood pressure
• Allergic reactions (rash, swelling, difficulty breathing)
• Elevated prolactin leading to menstrual changes, breast changes, or reduced fertility with longer-term use

Seek immediate medical attention for chest pain, fainting, irregular heartbeat, high fever with muscle rigidity, severe allergic reaction, or difficulty breathing.

This list is not exhaustive. Patients should report any new or worsening symptoms to their care team promptly.

Drug Interactions

Amisulpride can interact with a range of other substances, including:

• Other medications affecting heart rhythm (certain antibiotics, antiarrhythmics, and other QT-prolonging drugs)
• Other dopamine-affecting medications, including some Parkinson’s disease treatments
• Central nervous system depressants, such as sedatives or opioids, which may increase drowsiness
• Over-the-counter (OTC) medications, including some cold and allergy products
• Supplements and herbal products, which can sometimes affect drug metabolism or add to sedative effects

Patients should give their full, current medication and supplement list — including OTC products — to the prescribing specialist and pharmacist before starting amisulpride, and whenever a new product is added.

Safety & Important Considerations

• Kidney disease: Since amisulpride is largely cleared through the kidneys, patients with reduced kidney function may require dose adjustment and closer monitoring.
• Liver disease: Should be discussed with the prescribing specialist, as with any systemic medication.
• Pregnancy: Amisulpride should only be used in pregnancy if a specialist determines the benefits outweigh potential risks; discuss any pregnancy or plans for pregnancy before use.
• Breastfeeding: Amisulpride is generally not recommended during breastfeeding; this should be discussed directly with the prescribing specialist.
• Children and adolescents: Use in children, particularly before puberty, is generally not recommended and requires specialist evaluation.
• Older adults: May be more sensitive to side effects such as low blood pressure, sedation, or movement-related symptoms.
• Heart health monitoring: Because of the potential for heart rhythm changes, an ECG or heart monitoring may be recommended, especially for patients with existing cardiac risk factors.
• FDA safety information: Prescribing information for the FDA-approved IV form includes specific warnings about heart rhythm effects (QT prolongation) and should be reviewed with the care team.

This information is not exhaustive. Any condition, medication, or personal risk factor should be discussed directly with the prescribing specialist.

Who This Medication Is For

• In the United States, amisulpride (IV form) is approved for adult surgical patients at risk of, or experiencing, postoperative nausea and vomiting.
• In countries where oral amisulpride is approved, it is generally prescribed for adults with schizophrenia, and in some countries, adults with certain forms of depression, under specialist supervision.

Use outside of these evaluated, approved populations should only occur under direct specialist guidance.

Who Should Not Take Amisulpride

Amisulpride is generally contraindicated in patients with:

• A known hypersensitivity or allergic reaction to amisulpride or its ingredients
• Pheochromocytoma (a specific adrenal gland tumor)
• Prolactin-dependent tumors, such as certain pituitary tumors or some breast cancers
• Movement disorders such as Parkinson’s disease or Lewy body dementia
• Significant, unmanaged heart rhythm abnormalities

Additional precaution is needed for patients with kidney impairment, cardiovascular disease, a history of low white blood cell counts, or risk factors for seizures.

A full medical history should always be reviewed by the prescribing specialist before amisulpride is used.

What to Do If You Miss a Dose

Because amisulpride’s FDA-approved use is a single IV dose administered by a medical team around the time of surgery, a “missed dose” scenario generally does not apply to patients in the U.S. setting.

For patients taking oral amisulpride under a specialist’s care (outside the U.S.):

• If a dose is missed, contact the prescribing specialist or pharmacist for specific guidance, as instructions can vary based on the treatment plan.
• Do not take a double dose to make up for a missed one unless specifically instructed to do so.
• If unsure, do not guess — reach out to the care team before taking any additional medication.

Related medications to Amisulpride

Oral Amisulpride is used for schizophrenic disorders in markets where it is authorized. Related antipsychotic pages include Risperidone, Paliperidone, and Olanzapine, although regulatory status and approved indications differ between countries.

Storage Instructions

• Store according to the specific instructions provided with the product, typically at controlled room temperature.
• Protect from excess moisture and direct light.
• The IV form is generally prepared and stored by hospital or clinical staff and is not typically stored at home.
• If any oral or take-home form is dispensed, keep it in its original, labeled container, out of reach and sight of children and pets.
• Do not use medication that is expired or appears damaged; consult a pharmacist with any questions about proper disposal.

Disclaimer:

This page is for educational purposes only. It is not a substitute for professional medical advice, diagnosis, or treatment. Patients must consult a licensed medical specialist — such as an anesthesiologist, surgical care provider, or psychiatrist, depending on the intended use — before starting, changing, or stopping treatment with amisulpride. Treatment decisions must be based on a full clinical evaluation by a qualified specialist.