felypressin + lidocaine + prilocaine

This drug is a **combination of three agents**: **felypressin**, **lidocaine**, and **prilocaine**. - **Felypressin** is a synthetic non-catecholamine vasoconstrictor structurally related to vasopressin, used in dentistry to limit blood flow and prolong the effect of local anesthetics[2][5]. - **Lidocaine** is an amide-type local anesthetic that stabilizes neuronal membranes by inhibiting the ionic fluxes required for the initiation and conduction of nerve impulses, causing a reversible local loss of sensation[4]. - **Prilocaine** is an amide local anesthetic similar to lidocaine but with less vasodilatory activity, sometimes combined with vasoconstrictors for dental anesthesia[5]. This combination could theoretically offer local anesthesia with vasoconstriction, which may be preferred in patients where adrenaline-containing preparations are contraindicated. **Felypressin** in the combination serves as the vasoconstrictor in place of epinephrine, aiming to reduce cardiovascular side effects, particularly in cardiac patients[1][5]. However, this exact three-agent combination (felypressin + lidocaine + prilocaine) does not correspond to any well-known, widely marketed commercial formulation; combinations of prilocaine + felypressin and lidocaine + epinephrine are common, and felypressin is sometimes combined with a single anesthetic in dental solutions[2][5]. No commercial product, clinical trial, or regulatory label specifically documents the standardized combination of all three (felypressin + lidocaine + prilocaine) as a single preparation for medical or dental use.