How long past expiration date can lidocaine be used?

Thank you for the useful answers! I've been cleaning out my dad's (very) expired bathroom cabinets and found a bottle that expired in 1993!! Good to know, it's in the garbage!

It does lose it's efficacy over time but it definitely is still good after the expiration date. Trial and error

I am using Lidocaine that expired 4 years ago, and it's still working just as well as if it was new.

The other answer is complete garbage! This guy must work for a pharmacy!

All drugs can be used past their expiration date. Period. There is no drug in the world that magically goes bad the day after the expiration date. Most drugs last for years after, with only a light potency loss.

Storage conditions effect shelf life greatly. Store in a cool dry place for best results.

Once the med has expired it has no efficacy, it needs to be destroyed.