The active substance is nicotine. Each lozenge contains 4 mg nicotine (as nicotine resinate). The other ingredients are lozenge core: mannitol (E421 ), xanthan gum, Winterfresh ROE4-149 Spray dried (gum arabic (E414), peppermint, menthol and eucalyptol flavourings), sodium carbonate, anhydrous {E500Xi), sucralose (E955), acesulfame potassil.m (E950), magnesium stearate (E470b). Coating: hypromellose (E464), Winterfresh RDE4-149 (peppermint, menthol and eucalyptol flavourings), titanium dioxide (E171), sucralose (E955), microcrystalline cellulose (E460), potassium aluminium silicate (E555). acesuHame potassium (E950), polysorbate 80 (E433). Always check the pack for updates.