RT Journal Article SR Electronic T1 Local anaesthetics for surface application JF Drug and Therapeutics Bulletin JO Drug Ther Bull FD BMJ Publishing Group Ltd SP 17 OP 18 DO 10.1136/dtb.2.5.17 VO 2 IS 5 YR 1964 UL http://dtb.bmj.com/content/2/5/17.abstract AB Local anaesthetics in a vehicle suitable for application to skin or mucous membranes are widely prescribed, mainly by general practitioners, gynaecologists, proctologists and dentists. These preparations contain various local anaesthetics, such as amethocaine (Anethaine - Glaxo; Locan and Trilocan - Allied; Menopax and Polycrest - Nicholas; Gingicain spray - Hoechst), benzocaine (Benzocaine compound BPC; Nestosyl - Bengué; RBC - Rybar), cinchocaine (Dermacaine - Medo Chemicals; Nupercainal - Ciba; Proctosedyl - Roussel; Scheriproct - Pharmethicals), cyclomethycaine (Surfadil and Surfathesin - Lilly), or lignocaine (Duncaine - Duncan Flockhart; Xylocaine - Astra-Hewlett; Xylotox - Willow Francis). They are most likely to be used when the specific cause of the discomfort is not obvious or is not easily dealt with radically. The manufacturer of Locan and Trilocan also claims that much of the benefit produced by these preparations is due to antibacterial and antifungal properties of amethocaine and amylocaine which are enhanced by the addition of benzalkonium chloride, an antiseptic.