300 mg of medication needs to be prepared for a patient and the instructions indicate that 10 mL of sterile water should be added for a single-dose use via injection. What is the final strength of thiAugust 22, 2020/in Health and Mendical /by Joseph300 mg of medication needs to be prepared for a patient and the instructions indicate that 10 mL of sterile water should be added for a single-dose use via injection. What is the final strength of this medication in milligrams? A. 30 mg B. 0.3 mg C. 3 mg D. 0.03 mg.