What kind of medication typically lacks an antimicrobial preservative and is intended for a single resident?

Single-dose medication is designed for one-time use for a specific resident and typically does not contain antimicrobial preservatives. This is because preservatives are often included in multi-dose medications to prevent contamination and allow for multiple uses from the same vial. In contrast, single-dose medications are sealed and meant to be used in one administration, thus eliminating the need for preservatives which can sometimes cause toxicity or allergic reactions in patients. By not including these preservatives, single-dose medications also aim to minimize the risk of infection by ensuring that each dose remains free from contamination until it is opened or used. This design approach aligns with infection control practices in nursing homes, promoting safe and effective medication administration.