The present application provides solid forms of (R)-6-(2-fluorophenyl)-N-(3-(2-(2- methoxyethylamino)ethyl)phenyl)-5,6-dihydrobenzo[h]quinazolin-2 -amine dihydrochloride, and methods of preparing and using same.La presente invención se refiere a formas sólidas de diclorhidrato de (R)-6-(2-fluorofenil)-N-(3-(2-(2- metoxietilamino)etil)fenil)-5,6-dihidrobenzo[h]quinazolin-2-amina y a métodos para preparar y utilizar las mismas.