Pipamperone (Dipiperon): Why This Butyrophenone Is Not in U.S. Pharmacies and What Telehealth Can Still Do

Last updated: August 25, 2026

Pipamperone is a typical butyrophenone antipsychotic sold in several European countries as Dipiperon (also Dipiperal, Piperonil, Piperonyl, and Propitan). Janssen developed it in 1961. U.S. retail pharmacies do not stock it as a current option. Families type the name after a Belgian or German bottle, an old discharge list, or a paper from a hospital stay abroad. This guide explains what pipamperone is, how labels describe dose ranges, and how telehealth can still help someone who needs an evaluation for psychosis, agitation, sleep disruption, or related symptoms.

This page is educational. It is not a diagnosis, a refill promise, or a claim that any plan will pay for a specific drug. Coverage varies by plan. Verify benefits before you book.

See conditions Klarity clinicians evaluate or learn how online anxiety and related mental health visits work.

TL;DR

• DrugBank (DB09286) describes pipamperone as a typical antipsychotic of the butyrophenone family used for schizophrenia. Janssen started clinical work after 1961. (DrugBank DB09286)
• Identifiers commonly listed: CAS 1893-33-0; PubChem CID 4830; UNII 5402501F0W; ATC N05AD05; formula C21H30FN3O2; molar mass about 375.49. Other names include floropipamide, carpiperone, McN-JR 3345, and R-3345. (Wikipedia: Pipamperone)
• Elimination half-life is often listed around 17-22 hours. Oral 40 mg tablets appear on European packs (for example Neuraxpharm Pipamperon). Those packs are not a U.S. prescription you can fill at a neighborhood pharmacy.
• A European patent summary of conventional labeling states adults often start at 40-80 mg a day, with a labeled maximum around 360 mg a day. Treat those figures as historic product facts, not a U.S. dosing guide. (EP2236138A1)
• The molecule blocks 5-HT2A and D4 more tightly than D2 at low dose, which is why some writers call it a forerunner of atypical antipsychotics. It is still a first-generation butyrophenone. Do not import unlabeled tablets or research chemical.
• Medicare behavioral telehealth in the home remains available on a permanent basis, with several other Medicare telehealth flexibilities extended through December 31, 2027 (HHS page last updated February 5, 2026). Klarity’s 2,000+ licensed providers can evaluate current symptoms and discuss medicines that U.S. pharmacies still stock. (HHS telehealth policy updates)

On this page

• What is pipamperone?
• Is Dipiperon available in the United States?
• How clinicians describe the pharmacology
• What overseas labels say about dose
• Safety, class risks, and what not to do
• What telehealth can still do
• How Klarity fits
• FAQ

What is pipamperone?

Pipamperone is the international name. Dipiperon is the brand most families remember from Belgium, Germany, and nearby markets. PubChem lists CID 4830. DrugBank accession is DB09286. The ATC code is N05AD05, in the same butyrophenone group as haloperidol, though the clinical personality is quieter and more sedating at typical European doses.

DrugBank’s public card is short and specific: a typical antipsychotic of the butyrophenone family used in the treatment of schizophrenia, developed by Janssen Pharmaceutica in 1961. Wikipedia adds that it has also been used as a sleep aid in depression and lists brand names Dipiperon, Dipiperal, Piperonil, Piperonyl, and Propitan. U.S. Adopted Name (USAN) exists; that does not mean a current FDA-marketed product sits on U.S. shelves.

If you found “Dipiperon 40 mg” on a European blister, you are looking at pipamperone. If you only searched “floropipamide” or “R-3345,” you are still looking at the same molecule.

Is Dipiperon available in the United States?

No commercial U.S. product is on pharmacy shelves as a routine fill. Clinical trials started in the United States in 1963, according to secondary histories, but the drug’s commercial life stayed largely in Europe. A U.S. clinician cannot transfer a Belgian Dipiperon script to a neighborhood pharmacy the way they can transfer many FDA-available antipsychotics.

People search “pipamperone” and “Dipiperon” after a move from Europe, after a family member’s old bottle, or after reading a paper that mentions low-dose 5-HT2A blockade. The U.S. answer is substitution with an FDA-available oral or long-acting antipsychotic, not a Dipiperon transfer. Do not import unlabeled tablets. A clinician licensed in your state should redesign the plan.

Browse condition pages if you need a starting point for what a visit can cover.

How clinicians describe the pharmacology

Pipamperone acts as an antagonist at 5-HT2A, 5-HT2B, 5-HT2C, D2, D3, D4, and alpha-1/alpha-2 adrenergic receptors. Binding tables often show much higher affinity for 5-HT2A and D4 than for D2 (on the order of 15-fold for D4 versus D2). Histamine H1 and muscarinic affinity are low. That receptor mix is why some authors treat it as a historical bridge to later “atypical” drugs, even though catalogs still list it as a first-generation butyrophenone.

Those binding numbers come from laboratory tables. They do not tell you which U.S. medicine is the right substitute. Haloperidol is a closer chemical cousin and a much more activating, high-potency option. Quetiapine or other sedating second-generation agents sometimes appear in conversations about sleep and agitation, but that is a clinical judgment, not a one-to-one swap.

What overseas labels say about dose

These figures are from secondary summaries of conventional European labeling. They are not a U.S. prescribing guide.

EP2236138A1, a patent on low-dose pipamperone for mood and anxiety research, recites the conventional adult start as 40 to 80 mg a day, with a stated maximum of 360 mg a day. Forty-milligram tablets are the pack strength most often photographed in Germany. Half-life listings of 17-22 hours support once- or twice-daily schedules on those labels.

Treat those numbers as product history. A U.S. clinician cannot fill Dipiperon at a standard U.S. retail pharmacy. Do not copy a European dose onto leftover tablets or an overseas order.

Safety, class risks, and what not to do

Butyrophenones as a class carry the same family warnings you already know from haloperidol: extrapyramidal symptoms, tardive dyskinesia with long use, neuroleptic malignant syndrome (rare), QT prolongation risk, and a higher death rate when antipsychotics are used in older adults with dementia-related psychosis. Pipamperone appears on QT-prolonging drug lists. Do not combine leftover tablets with other QT-prolonging medicines without a clinician who can see an ECG and a full list.

Do not import research chemical. Do not crush old European tablets to “match” a U.S. medicine. If someone is suicidal, violent, or unable to care for themselves, that is an emergency: call 988 or go to an emergency department.

What telehealth can still do

A video visit cannot put Dipiperon on a U.S. shelf. It can still:

• Take a history of psychosis, agitation, insomnia, anxiety, and prior medicines, including overseas brands
• Screen for medical red flags that need in-person care or labs
• Discuss FDA-available antipsychotics and sleep or anxiety options that U.S. pharmacies stock
• Plan follow-up and, when appropriate, coordinate with local labs or a higher level of care

HHS states that Medicare patients can permanently receive behavioral/mental telehealth in the home, with no geographic originating-site restriction, and that several other Medicare telehealth flexibilities run through December 31, 2027. The policy page was last updated February 5, 2026. Commercial and Medicaid rules differ. Coverage varies by plan. Verify benefits before you book.

How Klarity fits

Klarity’s network includes 2,000+ licensed providers. A visit is an evaluation, not a promise of a named drug. If worry, restlessness, or tension is the main problem you want to discuss, start with online anxiety treatment. If you are mapping symptoms more broadly, use the conditions index.

Insurance may help pay for the visit. It typically does not create a special exception for an unapproved import. Ask your plan what it covers. If you are in crisis, call or text 988.

FAQ

Is pipamperone the same as Dipiperon?

Yes. Dipiperon is the best-known brand. Dipiperal, Piperonil, Piperonyl, and Propitan point to the same active ingredient.

Can a U.S. telehealth clinician prescribe pipamperone?

They cannot fill a medicine U.S. pharmacies do not stock. They can evaluate symptoms and discuss FDA-available alternatives.

Is pipamperone an atypical antipsychotic?

Catalogs list it as a typical butyrophenone. Receptor tables show stronger 5-HT2A and D4 blockade than D2 at low dose, which is why some papers call it a forerunner of later atypicals.

What should I do with leftover European tablets?

Do not self-taper from an old bottle without medical advice. Bring the name, strength, and dates to a licensed clinician. Dispose of unused medicine through a take-back program when you can.

See if an online mental health visit is a fit or review conditions Klarity evaluates. Coverage varies by plan. Verify benefits before you book.