Alimemazine

Alimemazine (INN), also known as trimeprazine, commonly provided as a tartrate salt, is a phenothiazine derivative that is used as an antipruritic (it prevents itching from causes such as eczema or poison ivy, by acting as an antihistamine).^[3] It also acts as a sedative, hypnotic, and antiemetic for prevention of motion sickness.

Alimemazine

Clinical data
Other names	trimeprazine, trimeprazine (BAN UK), trimeprazine (USAN US)
AHFS/Drugs.com	International Drug Names
License data	US DailyMed: Trimeprazine
Pregnancy category	AU: C
Routes of administration	By mouth
Drug class	Anti-allergic agent
ATC code	R06AD01 (WHO)
Legal status
Legal status	UK: POM (Prescription only) US: ℞-only[1]
Pharmacokinetic data
Metabolism	Liver
Elimination half-life	4.78 ± 0.59 hours[2]
Identifiers
IUPAC name N,N,2-trimethyl-3-phenothiazin-10-yl-propan-1-amine
CAS Number	84-96-8 Y
PubChem CID	5574
IUPHAR/BPS	7237
DrugBank	DB01246 Y
ChemSpider	5373 Y
UNII	76H78MJJ52 362NW1LD6Z
KEGG	D07125 Y D02245
ChEMBL	ChEMBL829 Y
CompTox Dashboard (EPA)	DTXSID9023708
ECHA InfoCard	100.001.434
Chemical and physical data
Formula	C18H22N2S
Molar mass	298.45 g·mol−1
3D model (JSmol)	Interactive image
SMILES S2c1ccccc1N(c3c2cccc3)CC(C)CN(C)C
InChI InChI=1S/C18H22N2S/c1-14(12-19(2)3)13-20-15-8-4-6-10-17(15)21-18-11-7-5-9-16(18)20/h4-11,14H,12-13H2,1-3H3 Y Key:ZZHLYYDVIOPZBE-UHFFFAOYSA-N Y
(verify)

Despite being structurally related to the molecule chlorpromazine, it is not used as an antipsychotic.^[4]

Society and culture

Brand names

Brand names include Nedeltran, Panectyl, Repeltin, Teraligen, Therafene, Theraligene, Theralen, Thegalin, Theralene, Vallergan, Vanectyl, and Temaril.

Use by Country

In the Russian Federation, it is sold under the brand name Teraligen for the treatment of anxiety disorders (including GAD), organic mood disorders, sleep disturbances, personality disorders accompanied by asthenia and depression, somatoform autonomic dysfunction and various neuroses.^[5]

Veterinary use

In the United States, the Food and Drug Administration (FDA) has not approved it for human use, and it can only be prescribed by veterinarians.

A novel combination drug that combines alimemazine with prednisolone and sold under the brand name Temaril-P is licensed as an antipruritic and antitussive in dogs.^[6] A generic version of the combination trimeprazine/prednisolone was approved by the US Food and Drug Administration (FDA) in June 2024.^[7][8]