Known targets — ChEMBL curated mechanism
The experimentally established mechanism targets of Cetirizine. The predicted profile below is derived independently by chemical similarity — agreement is a validation signal, a miss is honest.
Predicted protein targets (top 20)
| gene | UniProt | supporting neighbours | confidence | |
|---|---|---|---|---|
| ▸ | HRH1 known ✓ | P35367 | 4/20 | 1.00 |
| ▸ | DRD3 | P35462 | 5/20 | 1.00 |
| ▸ | USP2 | O75604 | 3/20 | 1.00 |
| ▸ | HRH2 | P25021 | 2/20 | 1.00 |
| ▸ | HTR2A | P28223 | 2/20 | 1.00 |
| ▸ | HTR2B | P41595 | 2/20 | 1.00 |
| ▸ | KCNH2 | Q12809 | 2/20 | 1.00 |
| ▸ | TDP1 | Q9NUW8 | 2/20 | 1.00 |
| ▸ | SLC6A2 | P23975 | 1/20 | 1.00 |
| ▸ | SLC6A4 | P31645 | 1/20 | 1.00 |
| ▸ | SLC6A3 | Q01959 | 1/20 | 1.00 |
| ▸ | TEK | Q02763 | 1/20 | 1.00 |
| ▸ | DRD2 | P14416 | 4/20 | 0.74 |
| ▸ | ABCB11 | O95342 | 1/20 | 0.74 |
| ▸ | CHRM2 | P08172 | 1/20 | 0.74 |
| ▸ | ADRA2A | P08913 | 1/20 | 0.74 |
| ▸ | ADRA2B | P18089 | 1/20 | 0.74 |
| ▸ | ADRA2C | P18825 | 1/20 | 0.74 |
| ▸ | DRD4 | P21917 | 1/20 | 0.74 |
| ▸ | HTR7 | P34969 | 1/20 | 0.74 |
Click a target to see other patent compounds predicted against it — the reverse direction, in place.
Similar compounds — the chemically nearest patent molecules
Nearest neighbours by Morgan-fingerprint cosine across the patent-compound collection, with each neighbour's top predicted target and the predicted targets it shares with this molecule.
| Compound | similarity | top predicted | shared targets | |
|---|---|---|---|---|
| Cetirizine SCHEMBL13724610 | 1.00 | DRD3 (1.00) | DRD3HRH1USP2HRH2HTR2A | |
| Levocetirizine SCHEMBL5935097 | 1.00 | DRD3 (1.00) | DRD3HRH1USP2HRH2HTR2A | |
| Levocetirizine SCHEMBL4914 | 1.00 | DRD3 (1.00) | DRD3HRH1USP2HRH2HTR2A | |
| Cetirizine SCHEMBL2455487 | 1.00 | DRD3 (1.00) | DRD3HRH1USP2HRH2HTR2A | |
| Cetirizine SCHEMBL5526985 | 1.00 | DRD3 (1.00) | DRD3HRH1USP2HRH2HTR2A | |
| Cetirizine SCHEMBL6474316 | 0.99 | DRD3 (0.98) | DRD3HRH1USP2HRH2HTR2A | |
| Cetirizine SCHEMBL2430457 | 0.99 | DRD3 (0.98) | DRD3HRH1USP2HRH2HTR2A | |
| Cetirizine SCHEMBL41107 | 0.99 | HRH1 (1.00) | DRD3HRH1USP2HRH2HTR2A | |
| Levocetirizine SCHEMBL2255374 | 0.99 | HRH1 (1.00) | DRD3HRH1USP2HRH2HTR2A | |
| Cetirizine SCHEMBL5520719 | 0.99 | HRH1 (1.00) | DRD3HRH1USP2HRH2HTR2A |
Similarity is cosine over the 2,048-bit Morgan fingerprint (≈ Tanimoto). Identical fingerprints score 1.00.
Patent provenance — the patents this molecule appears in, and who filed them
Appears in 29593 patents — a generic fragment claimed broadly, so it's down-weighted as IP noise. Top by claim status then date:
| Patent | Title | Assignee | Published | Priority | Filing | Country | Status |
|---|---|---|---|---|---|---|---|
| US-6436924-B1 | — | — | None | — | — | US | claimed |
| WO-2026100654-A1 | NUCLEIC ACID INTRODUCTION AID, NUCLEIC ACID INTRODUCTION AGENT, AND NUCLEIC ACID INTRODUCTION METHOD | 株式会社インファーマシア | 2026-05-15 | — | — | WO | claimed |
| CN-122042882-A | Thin-layer chromatography identification method of xipanyi Gum fixing liquid and application thereof | 新奇康药业股份有限公司 | 2026-05-15 | — | — | CN | claimed |
| CN-122010947-A | Antagonists of adenosine A2a receptors | 阿道尔克斯治疗有限公司 | 2026-05-12 | — | — | CN | claimed |
| CN-122017088-A | UPLC-based construction method of characteristic spectrum of xipayi Gum fixing liquid and method for measuring content of characteristic components of UPLC-based construction method | 新奇康药业股份有限公司 | 2026-05-12 | — | — | CN | claimed |
| EP-4736841-A1 | A MUCOADHESIVE LAYER FOR BUCCAL ADMINISTRATION OF AN ACTIVE PHARMACEUTICAL INGREDIENT | IQ medical GmbH (DE) | 2026-05-06 | — | — | EP | claimed |
| EP-4734952-A1 | ORAL TABLET WITH IMPROVED UNIFORMITY OF CONTENT OF ACTIVES | Fertin Pharma A/S (DK) | 2026-05-06 | — | — | EP | claimed |
| US-20260115184-A1 | DOSING REGIMEN FOR INJECTABLE CETIRIZINE | JDP THERAPEUTICS LLC (US) | 2026-04-30 | — | — | US | claimed |
| US-20260109705-A1 | COMPOUNDS AND METHODS FOR THE TREATMENT OF OCULAR DISORDERS | Azura Ophthalmics Ltd. (IL) | 2026-04-23 | — | — | US | claimed |
| EP-4719179-A2 | MANUFACTURING METHODS FOR GASTRIC RESIDENCE SYSTEMS | Nortiva Bio, Inc. (US) | 2026-04-08 | — | — | EP | claimed |
| US-4829064-A | ACRIVASTINE, ASTEMIZOLE, AZATADINE, CETIRIZINE, KETOTIFIN, LORATIDINE | ANALGESIC ASSOCIATES (US) | 1989-05-09 | — | — | US | claimed |
| EP-0311677-A1 | COUGH/COLD MIXTURES COMPRISING NON-SEDATING ANTIHISTAMINE DRUGS. | SUNSHINE ABRAHAM (US) | 1989-04-19 | — | — | EP | claimed |
| CN-1030358-A | GENERIC ZERO ORDER CONTROLLED DRUG DELIVERY SYSTEM | PFIZER (US) | 1989-01-18 | — | — | CN | claimed |
| US-4792448-A | Generic zero order controlled drug delivery system | PFIZER INC. (US) | 1988-12-20 | — | — | US | claimed |
| WO-1988009656-A1 | COUGH/COLD MIXTURES COMPRISING NON-SEDATING ANTIHISTAMINE DRUGS | SUNSHINE ABRAHAM (US) | 1988-12-15 | — | — | WO | claimed |
| EP-0294993-A1 | A generic zero order controlled drug delivery system | PFIZER INC. (US) | 1988-12-14 | — | — | EP | claimed |
| US-4783465-A | Cough/cold mixtures comprising non-sedating antihistamine drugs | ANALGESIC ASSOCIATES (US) | 1988-11-08 | — | — | US | claimed |
| WO-1988008302-A1 | COUGH/COLD MIXTURES COMPRISING NON-SEDATING ANTIHISTAMINE DRUGS | SUNSHINE ABRAHAM (US) | 1988-11-03 | — | — | WO | claimed |
| US-4525358-A | ANTIHISTAMINES, ANTIALLERGENS, ANTISPASMODICS, BRONCHODILATORS | UCB PHARMACEUTICALS, INC. (US) | 1985-06-25 | — | — | US | claimed |
| EP-0058146-B1 | 2-(4-(DIPHENYLMETHYL)-1-PIPERAZINYL)-ACETIC ACIDS AND THEIR AMIDES, PROCESS FOR THEIR PREPARATION AND PHARMACEUTICAL COMPOSITIONS | U C B, S.A. (BE) | 1984-06-27 | — | — | EP | claimed |