An order calls for Hytone 1% cream, Lotrimin 1% cream, aa q. s. How many grams of Lotrimin cream would be needed to make a total of 60 g of cream?

The words aa q. s. is an abbreviation which is used in pharmacy. This is usually written by prescribers and then translated by pharmacists. The aa is derived from Latin which means "of each" while q. s. is also derived from Latin which means "a sufficient quantity". This simply means that there is equal amount of Hytone 1% cream and Lotrimin 1% cream in the total cream formulation.

Since we are to make a total of 60 g of cream, therefore 50% of it would be Lotrimin cream.

Amount of Lotrimin cream needed = 0.5 (60 g)

Amount of Lotrimin cream needed = 30 grams