A 25-year-old male presents to clinic complaining about eye painand itching in his eyes. Upon examination the ophthalmologist foundredness and some discharge of yellow pus. He looked into the retinato see if there were any abnormalities. He then cultured the pusand found a bacterial infection. He prescribed a fortifiedtobramycin ophthalmic solution of 0.5% w/v. The patient took theprescription to the pharmacist. The pharmacist looked at hisshelves and found a tobramycin solution containing only 3 mg/mLconcentration and a tobramycin injection containing 40 mg/mL. Howmany milliliters of this injection the pharmacist must addaseptically to a 5-mL container of the ophthalmic solution toprepare one 0.5% w/v in concentration
