A new study has uncovered how the commonly used local anesthetic drug, lidocaine, activates bitter taste receptors to exert an anti-cancer effect in head and neck cancers. Given its low cost and ready ...

Medically reviewed by Alexis Appelstein, DO Key Takeaways Novocaine numbness generally lasts about 15 minutes to an hour, but it depends on the amount and type of anesthetic used. You may be able to ...