Which practice is crucial for infection control when dealing with medications?

Sanitizing hands before the administration of medications is a crucial practice for infection control. This step is fundamental in reducing the risk of introducing pathogens into a resident's system, which can lead to infections. Proper hand hygiene is widely recognized as one of the most effective measures to prevent the spread of infections in healthcare settings, including assisted living environments.

By thoroughly washing or sanitizing hands, caregivers effectively eliminate bacteria and viruses that may have been transferred from surfaces, other individuals, or from direct contact with residents. This practice protects not only the individual receiving the medication but also helps maintain a healthier environment for all residents.

The other practices mentioned do not adequately address infection control. Storing medications at room temperature is important for their efficacy but does not prevent infection. Using any available water for diluting medications can lead to contamination if the water is not sterile. Sharing medications between residents increases the risk of cross-contamination and exposure to various pathogens, which could promote infection spread rather than control it. Thus, hand sanitization stands out as a critical step in maintaining infection control during medication administration.