psd-502 and 2-6-xylidine

Oraqix, a new non-injection local anesthetic, lidocaine/prilocaine gel 5%, has been developed to provide pain relief in association with periodontal probing and scaling/root planing (SRP). The aim of this open study was to describe the plasma profiles of lidocaine and prilocaine following a single dose of Oraqix to patients with advanced periodontitis.. 10 patients with 18 to 28 teeth with pocket depths of at least 4 mm were included. Oraqix was applied in the pockets around all the teeth in the mouth by means of a blunt applicator. The total dose applied per patient was 0.9 to 3.5 g. Directly thereafter all the pockets were probed and 3 teeth subjected to SRP. The mouth was rinsed out with a glass of water 20-27 min after the application of the gel. Blood samples were collected before and up to 90 min after the start of application of Oraqix.. Peak plasma concentrations of lidocaine (99-266 ng/ml) and prilocaine (46-118 ng/ml) occurred 20-40 min after the start of application. These levels were low compared to those reported to cause initial signs of CNS toxicity (5000-6000 ng/ml). Side-effects were few and mild local effects of short duration.. In conclusion, there is a large safety margin with respect to systemic effects following the application of up to 3.5 g Oraqix in periodontal pockets.

Topics: Administration, Topical; Adult; Anesthetics, Combined; Anesthetics, Local; Aniline Compounds; Chromatography, Liquid; Dental Scaling; Female; Follow-Up Studies; Gels; Humans; Lidocaine; Lidocaine, Prilocaine Drug Combination; Linear Models; Male; Mass Spectrometry; Middle Aged; Mouthwashes; Periodontal Pocket; Periodontitis; Prilocaine; Regression Analysis; Root Planing; Safety; Toluidines; Water