No prescription may be filled except on the day it is issued or the following day. No more than one-half pint of alcohol may be sold and delivered on one prescription. When a prescription is filled, it may not be refilled. No druggist who is also a practicing physician may fill his own prescription for pure alcohol nor shall the prescription be filled at a drugstore in which the physician is financially interested. The delivery of the alcohol sold by prescription must be made directly to the person for whom the prescription is issued, to the physician, or to a person authorized by the physician; or in case of a minor, to his parent, guardian, physician, or a person authorized by the physician.