The invention provides acid addition salts of a basic therapeutic agent wherein the acid is represented by Formula I or Formula II,wherein Ar, R1, R2, R3, R4, and R5 are as defined herein. The invention also provides pharmaceutical compositions comprising a pharmaceutically acceptable carrier or excipient and an acid addition salt of the invention and a method of using an acid addition salt of the invention for treating a disease or disorder in a subject in need thereof.
