PHARMACEUTICAL FORMULATIONS FOR THE CONTROLLED RELEASE OF 4-AMINO-6,7-DIMETHOXY-2-(5-METHANESULFONAMIDO-1,2,3,4-TETRAHYDROISOQUINOL-2-YL)-5-(2-PYRIDYL) QUINAZOLINE

摘要

The invention provides a controlled-release pharmaceutical formulation for oral administration comprising 4-amino-6,7-dimethoxy-2-(5-methanesulfonamido-1,2,3,4-tetrahydroisoquinol-2-yl)-5-(2-pyridyl)quinazoline, or a pharmaceutically acceptable salt thereof; and a pharmaceutically acceptable adjuvant, diluent or carrier; characterized in that the formulation is adapted to release at least 50% by weight of the 4-amino-6,7-dimethoxy-2-(5-methanesulfonamido-1,2,3,4-tetrahydroisoquinol-2-yl)-5-(2-pyridyl)-quinazoline, or the pharmaceutically acceptable salt thereof, after 6 hours in Apparatus 1 described in the United States Pharmacopoeia 24 (2000), pp 1941-1943, having 1 litre vessels, baskets of 40 mesh (0.4 mm apertures), a rotation speed of 100 rpm, and a dissolution medium consisting of 900 ml of 0.01 M hydrochloric acid containing 0.7% w/v sodium chloride at 37 DEG C. Formulations according to the invention are suitable for the treatment of BPH.