a) administering a safe therapeutically effective amount of N- {4- [2- (1,2,3,4-tetrahydro-6,7-dimethoxy-2-isoquinolinyl) -ethyl] -phenyl} -Dihydro-5-methoxy-9-oxo-4-acridinecarboxamide and physiologically acceptable salts and solvates thereof; b) a safe effective amount of a surfactant; c) buffering agents; And d) a pharmaceutically acceptable carrier. A pharmaceutical composition for preventing or minimizing precipitation upon injection or infusion.
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