The effect of creosote is similar to that of phenol, but its toxicity and irritancy are small. It is the main component of Zhenglu Pill and has the functions of sterilization, antisepsis and deodorization. Oral small dose is an expectorant for chronic bronchitis and bronchiectasis, or steam inhalation. Topical for topical analgesic, it can relieve pain in the fangs.