[2-(Dimethylamino)ethyl]benzyl-2-pyridylamine, chloride

UsesTripelennamine is a first-generation antihistamine, used in the treatment of asthma, hay fever, and urticaria.

Usesantihistaminic;histamine H1 antagonist

General DescriptionTripelennamine hydrochlorideis a white crystalline powder that darkensslowly on exposure to light. The salt is soluble in water(1:0.77) and in alcohol (1:6). It has a pKa of about 9, and a0.1% solution has a pH of about 5.5.Tripelennamine, the first ethylenediamine developed inthe United States and is well absorbed when given orally. Itappears to be as effective as diphenhydramine and may havethe advantage of fewer and less severe side reactions.Drowsiness may occur, however, and may impair the abilityto perform tasks requiring alertness. The concurrent use ofalcoholic beverages should be avoided.

General DescriptionOdorless white crystalline powder or solid. Bitter taste. Solutions are neutral to litmus. pH of aqueous solution (25 mg/mL): 6.71. pH of aqueous solution (50 mg/mL): 6.67. pH of aqueous solution (100 mg/mL): 5.56.