- Furthermore, Many of the drugs present in Safoof-e-Muhazzil including Lac which itself is a constituent of Safoof-e-Muhazzil have been attributed by Unani physicians to have de obstruent, desiccant, and softening and relaxant effect on vessel walls properties which further supports our hypothesis. These properties are also in cohesion with our hypothesis and perhaps these drugs may have scraping effect on atherosclerotic vessel walls.