Apharmacist is asked to compound 60 ml of an isotonic eye drop. drug x (a liquid with an e-value of 0.33) and sodium chloride will be used to prepare a final concentration of 1: 500 (w/v). how many milligrams of sodium chloride must be added to make the eye drops isotonic?

The correct answer is 500mg.

First convert the ratio strength to a percentage(0.2%).

Drug X accounts for 0.0396 g of NaCl.

It would require 0.54 g of NaCl if that was all we were using.

Lastly, 0.54 g - 0.0396 = ~ 0.5 g NaCl ( or 500 mg, rounded as per the instructions ).

that information cannot be released except with patient permission or to immediate family members. you could state the patient is ok but you cannot give any information on the illness or on treatment being given.