Yes, sterile water does expire.
Sterile water, specifically sterile water for injection, is given an expiration date by the FDA. This date is based on the product's expected ability to maintain sterility and physical integrity throughout its shelf life. After the expiration date, several issues can arise that compromise the water's safety and effectiveness:
- Loss of Sterility: The primary concern is that the container's seal (including the vacuum, if present) may degrade over time. This degradation can allow bacteria or other contaminants to enter the sterile water, rendering it non-sterile and unsafe for use.
- Container Degradation: The container itself may break down, leading to leaks or the introduction of foreign particles into the water.
- Chemical Changes: Although it's less common with pure water, subtle chemical changes might occur over extended periods that could affect the suitability of the water for its intended purpose.
Therefore, it is crucial to always check the expiration date on sterile water and discard any vials or bottles that have expired. Using expired sterile water can lead to serious infections or other adverse health consequences.
