Kangfuxin Guccal Tablets

To explore the safety of Kangfuxin lozenges, especially to evaluate their effects on the eyes and gastrointestinal tract. To use the ulcer healing rate as an observation indicator, to preliminarily explore the optimal course of treatment for Kangfuxin lozenges in the treatment of mild recurrent aphthous ulcers (oral ulcers - Yin deficiency and hyperactivity of fire syndrome), and to provide a basis for Phase II clinical trials.