What is the frequent employed method in the manufacture of ointments wherein the active ingredient is mixed with the melted waxes and base?

The frequently employed method in the manufacture of ointments is known as the "fusion method." In this process, the active ingredients are mixed with melted waxes and ointment bases while maintaining a controlled temperature to ensure proper mixing and uniformity. Once the mixture is homogeneous, it is cooled and solidified to form the final ointment product. This method is particularly effective for incorporating heat-sensitive active ingredients into the formulation.