It is possible to have a painless gastroscopy with an allergy to salbutamol. There are also contraindications to painless gastroscopy and it cannot be done when there is a history of drug allergy, especially when there is an allergy to anesthesia or sedative drugs. Saxative drugs refer to quinolone antimicrobial drugs, and allergy to such drugs does not usually affect painless gastroscopy. However, after the gastroscopy examination, if the combination of bacterial infection, most of the antibacterial drug treatment will be chosen, because of the allergy to the sarsin-like drugs, you need to pay attention to, can not take quinolone drugs. Before the painless gastroscopy, there are some precautions that need to follow the doctor’s instructions. After the examination, if you need to use drugs, you need to tell the doctor about your own condition, so as not to use allergic drugs, discomfort symptoms.