Bismuth potassium citrate may cause patients to experience neurological symptoms such as dizziness and weakness. The side effects of bismuth potassium citrate are minor, some patients may experience ammonia taste in the mouth, grayish-black stools, and sometimes patients may experience digestive symptoms such as nausea and constipation, which usually disappear after stopping the drug. Some patients may also experience allergic phenomena such as skin rashes and redness of the skin, and in severe cases, the medication should be discontinued in time. Bismuth potassium citrate can also lead to neurological symptoms, such as dizziness, headache, poor mental performance, fatigue, etc. This is mainly due to the drug’s action on the nervous system, which in turn causes adverse reactions, but most patients will tolerate it and the symptoms are not obvious. If the patient’s adverse reaction seriously affects normal life, it is necessary to stop the drug in time and go to the hospital.