What is the abbreviation for Sufficient quantity?

• A. q.s
• B. kg
• C. elix.
• D. comp

Answer: (A)

The expression for a sufficient quantity is q.s., short for quantum sufficit (or quantum satis), meaning “the amount that suffices.” In compounding, this tells you to add diluent or solvent up to the final desired amount rather than a fixed measure. For example, you might see a recipe that says to make the solution up to a final volume of 100 mL, so you’ll add water q.s. to 100 mL—adding enough solvent until the total reaches 100 mL. This ensures the final product has the correct total quantity while the active ingredient is present at the intended strength. The other options refer to different ideas (a unit of mass, a type of liquid preparation, or a shorthand for a compound) and do not convey the instruction to fill to a final amount.