Question

A 25-year-old male presents to clinic complaining about eye pain and itching in his eyes. Upon examination the ophthalmologist found redness and some discharge of yellow pus. He looked into the retina to see if there were any abnormalities. He then cultured the pus and found a bacterial infection. He prescribed a fortified tobramycin ophthalmic solution of 0.5% w/v. The patient took the prescription to the pharmacist. The pharmacist looked at his shelves and found a tobramycin solution containing only 3 mg/mL concentration and a tobramycin injection containing 40 mg/mL. How many milliliters of this injection the pharmacist must add aseptically to a 5-mL container of the ophthalmic solution to prepare one 0.5% w/v in concentration

Answer 1

trenyth of Pirst Solution (C)- osi (1) trength of second salution UV2) CIV1- C2V2 0.5x3 0.5X3 Iml volume of Cvs) Ho mglm Volume of formula C2XHO C2 40 C2 0.037s malm