The side effects of telmisartan are as follows: 1. neurological symptoms, dizziness, headache, headache, etc. 2. respiratory symptoms, upper respiratory tract-like flu-like symptoms can occur, such as coughing. 3. digestive system symptoms, nausea, vomiting, abdominal distension, gastric distension, etc. 4. cardiovascular system symptoms, some patients can experience chest tightness and panic after taking telmisartan. 5. allergic Symptoms, rash, itchy skin, hives, etc. can occur. The side effects of telmisartan are relatively small and usually disappear after a week of discontinuation, so there is no need to be too nervous.