How long should a dentist wait before he starts to drill?
Here is a list od some dental anaesthetics that lists an average onset time for each drug. By the way, Novocaine has not been used in 20 or more years. COOK-WAITE Carbocaine 2% with Neo-Cobefrin 1:20,000 (mepivacaine hydrochloride and levonordefrin injection, USP) Vasoconstrictor: Levonordefrin 1:20,000 Average Onset Time: 1 Minute COOK-WAITE Carbocaine 3% (mepivacaine hydrochloride injection, USP) without vasoconstrictor Vasoconstrictor: None Average Onset Time: 1 Minute COOK-WAITE Lidocaine HCI 2% and epinephrine 1:100,000 injection Vasoconstrictor: Epinephrine 1:100,000 Average Onset Time: 2 to 4 Minutes COOK-WAITE Lidocaine HCI 2% and epinephrine 1:50,000 injection Vasoconstrictor: Epinephrine 1:50,000 Average Onset Time: 2 to 4 Minutes COOK-WAITE ZORCAINE (articaine hydrochloride 4% with epinephrine 1:100,000 injection) Vasoconstrictor: Epinephrine 1:100,000 Average Onset Time: 1 to 6 Minutes Marcaine 0.5% with Epinephrine Vasoconstrictor: Epinephrine 1:200,000 Average Onset Time:
