What two age groups require special attention when dispensing drugs?

Those from 18-30 require special attention when drugs are being disbursed, because those of this age group are the most prolific drug abusers. It is important to ensure that the one who receives the drugs is not someone who will abuse them. In a different way, it is important to give special attention to those 65 and older because they, due to age and medical conditions, are prone to adverse reactions to many drugs. Also, they may be on many different drugs already, so it is important to ensure that all drugs are compatible.