The precautions for drug sensitivity test are to ensure the specimen clean, prepare the drug concentration and total amount according to the therapeutic amount, the sampling timing should be in place, and create good conditions for bacterial culture. 1. Ensure specimen cleanliness: qualified specimens can obtain qualified results. In the process of sampling and examination, strict aseptic operation should be carried out to ensure that the specimen is clean. If it is a gynecological drug sensitivity test, it is also necessary to clean the vulva area to reduce the chance of the sample being contaminated. 2. Prepare the concentration and total amount of drug according to the therapeutic amount: the size of the inhibitory circle will be affected by the concentration and total amount of drug, so it should be prepared according to the therapeutic amount, and it should also be adsorbed evenly with the drug sensitivity tablets with good absorbency to ensure that the test results are safe and reliable. 3. Sampling timing should be in place: if the ointment is applied at the site of the drug sensitivity test, it is best not to sample, and it is recommended to stop the drug for three days before sample collection, otherwise the drug will have an impact on the results, resulting in inaccurate results. 4. Create good bacterial culture conditions: In order to ensure the accuracy of the results, you should also create good bacterial culture conditions. Generally, the temperature of bacterial culture conditions is 37 degrees Celsius for 12 to 18 hours. Some antibacterial drugs diffuse slowly, such as polymyxin, which can be placed in the refrigerator at about 4 degrees Celsius for 24 hours to allow the drug to diffuse evenly before culture.