what happens if u use expired eye drops

Using expired eye drops can lead to several negative consequences, including a loss of efficacy and the risk of contamination. Specifically, once eye drops expire, they can no longer be guaranteed to be sterile, increasing the likelihood of bacterial growth and contamination. This contamination can result in symptoms such as irritation, redness, and eye infection. Additionally, the effectiveness of the medication may be diminished, meaning that the drops may not provide the desired relief for the intended eye condition.