Hi I am currently taking pharmacology 100 and we are doing dosage/calculations in this class and there is a problem I cannot figure out can you help. Q:A dose of 450mg of penecillin has been ordered. The drug comes as 25mg/mL. What volume of solution is needed to obtain the correct dose? A: First, I think you have to covert the 450mg to mcg right? then you can use the formula...which he wants us to use the basic formula method...D/OH TIMES Q +X....???PLZ HELLP !!!