A 32-year-old male patient complains of dryness and burning pain in the back of the tongue. The symptoms have been lasting for 1 week. The pain increases when spicy food is taken. A day prior to that the patient had suffered from pneumonia and had been taking antibiotics. Objectively: the skin and mucosa of oral cavity are pale. The tongue mucosa is hyperemic and swollen; there is crumbling grey-and-white coating in the folds of the back of the tongue; the lateral surfaces of the tongue are desquamated. The saliva is thick and drags in threads after a spatula. Choose the most effective drug complex for topical treatment.