Strepsils Extra Blackcurrant Hexylresorcinol 2.4mg Lozenges (24). Strepsils Extra are formulated to bring effective relief from Extra Blackcurrant lozenges painful sore throats.. The active ingredient in Strepsils Extra Blackcurrant is an antiseptic which combats the bacteria which can cause sore throat conditions and also has a local anaesthetic action which brings relief from pain and discomfort.. Each lozenge contains the active ingredient: Hexylresorcinol Ph Eur 2.4mg.
