Expressing Percentage Concentration in a Drug: 3 Ways
This article throws light upon the three main ways for expressing percentage concentration in a drug. The ways are: 1. Weight in Weight (W/W) 2. Weight in Volume (W/V) 3. Volume in Volume (V/V). Way # 1. Weight in Weight (W/W): This expression is used when solids are mixed with solids e.g. in powders, paste, ointments etc. A 5% w/w [...]