No definite side effects or contraindications have been reported for Ermiao San. Ermiao San is a Chinese herbal formula composed of Huangbai and Cangzhu, which has the efficacy of clearing heat and drying dampness (removing heat and drying dampness), and is mainly used for treating musculoskeletal pain caused by dampness-heat infiltration (dampness and heat invading the intestinal tract, bladder, pubic area, lower limbs, etc.), redness, swelling and pain in the feet and knees, dampness-heat bandhas, or dampness-heat sores in the lower part of the body and eczema, and short and reddish urination (urine with small amount of volume and deep yellow color), etc. It is recommended to drink alcohol while taking Ermiao San. It should be noted that during the period of taking Ermiao San, no alcohol should be consumed, and no spicy, raw and cold products should be consumed. Drugs should be used under the guidance of a professional Chinese medicine practitioner to standardize the use of drugs, not to blindly use their own medicine, so as not to cause adverse consequences.