**3.2 Loss of potency**

Some drugs are sensitive to heat, and the drying process can cause a loss of potency. The drying conditions must be carefully optimized to ensure that the drugs are dried efficiently without compromising their potency. The drying temperature,

time, and humidity must be carefully monitored to prevent excessive exposure of the drug to heat and moisture.

### **3.3 Residual solvents**

Some pharmaceutical products require solvents to dissolve the active ingredients. Residual solvents can be left behind after the drying process, and these can be harmful to the patient. Therefore, it is essential to use proper solvent removal techniques to ensure that no residual solvent is left behind in the final product.
