This paper summarized TONG Xiaolin's clinical experience in using "poisonous" Chinese material medica to treat metabolic diseases， who believes that toxicity reducing and efficacy enhancing can be achieved through carefully considered dosage， reasonable combination of medicinals， and appropriate preparation and administration ways.By analyzing the functions of Chinese material medica and findings from modern pharmacology and toxicology， the clinical dosage features， combination of medicinals and medication， preparation and administration methods and other precautions have been summarized regarding Huanglian （Rhizoma Coptidis） in treating diabetes， Xixin （Radix et Rhizoma Asari）， Dahuang （Radix et Rhizoma Rhei） and Shuizhi （Hirudo） in treating diabetic kidney diseases， Zhichuanwu （Radix Aconiti Praeparata）， Zhicaowu （Radix Aconiti Kusnezoffii Praeparata）， Xixin and Zhimaqianzi （Semen Strychni Praeparata） in treating diabetic peripheral neuropathy， Yinyanghuo （Herba Epimedii） and Wugong （Scolopendra） in treating diabetic erectile dysfunction， Fuzi （Radix Aconiti Lateralis Praeparata） and Banxia （Rhizoma Pinelliae） in treating diabetic gastroparesis， Hongqu （Monascus purpureus Went） and Weilingxian （Radix et Rhizoma Clematidis） in treating metabolic syndrome， as well as Leigongteng （Radix Tripterygii Wilfordii） and Huangyaozi （Rhizoma Dioscoreae Bulbiferae） in treating Hyperthyroidism， thereby providing reference for precise clinical medication.

“Cold-dampness entering ying （营）” is the key to the worsening of cold-dampness epidemic， and is more common in the elderly or critically ill cases of cold-dampness epidemic with pathogen exuberance and healthy qi deficiency. This paper reported a case of critically ill COVID-19 combined with multiple organ dysfunction treated by integrative traditional Chinese and western medicine based on “cold-dampness entering ying” theory. The patient did not have high fever after being infected with SARS-Cov-2， but D-dimer continued to increase， and she developed multiple thrombosis throughout the body and multiple organ dysfunctions such as pulmonary embolism， edema， oliguria， and shock. The patient were with enlarged and dusky tongue， with yellow， thick and greasy coating， and sublingual blood stasis， and thready， rapid and rough pulse. All these were characteristic manifestations of “cold-dampness entering ying”， and was differentiated as cold-dampness stasis. For the treatment， symptomatic and supportive western medicine of improving heart function， anti-infection， relieving asthma， stopping cough and reducing phlegm was given as the basic therapy， and additionally， traditional Chinese medicine to open the constraint and the blocked， save from collapse and restore yang， boost qi and relieve collapse， invigorate blood and drain water was used， usually with Modified Poge Zilong Xuanbai Chengqi Decoction （破格子龙宣白承气汤加减）， which was in accordance with the pathogenesis and thus achieving good effect.