amide local anesthetic
A class of local anesthetic agents metabolised by hepatic enzymes, characterised by an amide bond linking the aromatic ring to the intermediate chain; includes lidocaine, articaine, mepivacaine, bupivacaine, and prilocaine.
Full Definition
Amide local anesthetics are distinguished from ester local anesthetics by their chemical structure—an amide linkage (–NHCO–) rather than an ester linkage—and their metabolic pathway, which is primarily hepatic (via cytochrome P450 enzymes) rather than plasma cholinesterase-mediated. This is clinically significant because patients with pseudocholinesterase deficiency can safely receive amide agents. True allergic reactions to amide local anesthetics are extremely rare, a fact frequently misrepresented in patient histories; editors should query patient-history documents that attribute a 'local anesthetic allergy' without specifying the class or agent. All commonly used dental local anesthetics in contemporary practice are amides.
Usage
Usage note: When editing patient history or consent forms, verify whether 'local anesthetic allergy' specifies class (amide vs. ester); the distinction is clinically critical and must not be generalised.
In Context
- "The allergy section noted 'allergy to local anesthetics,' but the editor flagged this for clinical review, as the patient's prior reaction likely involved an ester agent, not the amide local anesthetic to be used." — Pre-anesthetic evaluation form
- "The textbook chapter devoted a full section to distinguishing amide local anesthetic metabolism from ester hydrolysis." — Dental pharmacology textbook