How many mL would be required for a dose of 300 mg if the drug concentration is 150 mg/2 mL?

To determine the volume in milliliters required for a dose of 300 mg given a drug concentration of 150 mg in 2 mL, you can first find out how much drug is contained in 1 mL. The concentration can be simplified to:

150 mg/2 mL = 75 mg/mL.

Now, to find out how many mL are needed for a dose of 300 mg, you can set up the calculation using the concentration:

300 mg ÷ 75 mg/mL = 4 mL.

Thus, you would require 4 mL to administer 300 mg of the drug. This calculation aligns with the concentration and dose provided, confirming that the volume needed is correctly identified.