Notriptyline hydrochloride and trimipramine maleate are used as antidepressants and analgesics. The density and viscosity of the aqueous solutions of these compounds are measured in a range of molality, m = (9.7.10(-6) to 32.5.10(-6)) mol.g(-1), at T = (293.15 to 313.15) K using a commercial densimeter and viscometer. The apparent molar volume (V(phi)), partial molar volume (V(m)(0)), partial molar expansivity (E(2)(0)), thermal expansion coefficient (alpha(2)), and Hepler's constant (partial derivative(2)V(m)(0)/partial derivative T(2)) are calculated from the density data. The values of the B-coefficient and hydration number (H(n)) are computed from the viscosity data.