It depends on the brand. My grandmother has been using the automatic decocting machine of Shanjia. It has been used for almost 10 years, and there has been no problem. The fever body did not affect the efficacy. Shanjia is an old brand, and it is the originator of all decoders on the market now. A few days ago, my grandmother thought the decoder was broken and asked me to fix it. Their attitude is very good, and there is nothing wrong with the decoder except maintenance. After they dealt with it, there was no problem at all. In short, the quality of Shanjia brand is very good, and it has no effect on drugs.