Huasu tablets, also known as cediriodine tablets, is a commonly used over-the-counter oral tablets, generally used in the treatment of laryngitis, mouth ulcers, gingivitis, periodontitis, chronic pharyngitis and other oral inflammation, its main ingredient is molecular iodine, iodine allergy is generally prohibited. Patients need to follow the doctor’s instructions to use the drug, common adverse reactions are occasionally seen rash, skin itching and other allergic reactions, long-term containing can lead to staining of the tongue, after stopping the drug can be subsided, pay attention to pregnant women and lactating women should be careful to use, and patients with thyroid disease should be careful to use.