This document provides instructions for determining the moisture content or loss on drying of a herbal drug extract. The process involves weighing 0.5g of finely powdered extract, drying it in an oven at 100-105°C for 3 hours, cooling in a desiccator, and calculating the percentage of moisture content in mg per gm of the original sample. Determining the moisture content reflects the quality and care taken during processing, as a lower moisture value ensures better quality of the extract.