Determine strength, dose, and how much to give (mL):
Take Chlortrimeton 4mg prn for hay fever.
Chlortrimeton 2mg / 5 cc.
a) Strength: 2mg/mL, Dose: 4mg, Volume: 10 mL
b) Strength: 2mg/mL, Dose: 2mg, Volume: 5 mL
c) Strength: 4mg/mL, Dose: 4mg, Volume: 2.5 mL
d) Strength: 4mg/mL, Dose: 2mg, Volume: 5 mL