Alimemazine (trimeprazine) is a phenothiazine-derivative antihistamine with sedative and antipruritic properties, used to relieve allergic skin conditions and as a short-term sedative, particularly in paediatric and dermatological practice. Simson Pharma's Alimemazine reference standard supports compendial testing of this legacy antihistamine.

Simson Pharma Global Ltd. (UK) and Simson Pharma Global LLC (USA) supply high-quality Alimemazine Reference Standards, pharmacopoeial reference materials, and its related impurities to pharmaceutical manufacturers, CROs, analytical laboratories, universities, and regulatory organizations worldwide. To service the Europe and America market efficiently, Simson Pharma Limited has set up Simson Pharma Global Ltd. in United Kingdom and Simson Pharma Global LLC in USA respectively.