Tetracaine is the T in Tac, a mixture of 5 to 12 percent tetracaine, 5% (per myriad), a half per mille (0.5%), or .05 percent (1 part in 2000) adrenaline, and 4 or 10 percent cocaine hydrochloride used in ear, nose & throat surgery and in the emergemcy department where numbing of the surface is needed rapidly, especially when children have been injured in the eye, ear, or other sensitive locations.
 (2) Tetracaine waa T ee Tac, isku dar ah ee 5 ilaa 12 per cent tetracaine, 5 milyan (per sugay), badh per Mille (0.5 ‰), ama .05 boqolkiiba (1 qayb 2000), iyo 4 ama 10 per cent hydrochloride isticmaalo dhegta, sanka iyo cunaha qalliin iyo waaxda emergemcy meesha kabuubiso ah ee dusha sare si degdeg ah loo baahan yahay, gaar ahaan marka carruur ah ayaa ku dhaawacmay isha, dhegta, ama meelo kale oo xasaasi ah.