<chemical> Histamine h1 antagonist with sedative action used as a hypnotic and in allergies. ... Pharmacological action: anti-allergic agents, histamine h1 antagonists, sedatives, nonbarbiturate. ... Chemical name: 1,2-Ethanediamine, N,N-dimethyl-N'-2-pyridinyl-N'-(2-thienylmethyl)- ... (12 Dec 1998) ... Found on http://www.encyclo.co.uk/local/20973