The clinically recommended time to take telmisartan is in the morning after waking up. Telmisartan is a clinically used antihypertensive drug whose main pharmacological effect is to antagonize angiotensin II and reduce vascular tone. This drug is recommended to be taken after waking up in the morning because research has found that human blood has physiological fluctuations, and blood pressure fluctuations are mostly in the peak state in the morning. Therefore, taking the drug at this time can effectively control blood pressure and reduce the occurrence of cardiovascular and cerebrovascular adverse events. At the same time, the half-life of telmisartan is relatively long, so it can be maintained for about a day. In addition, the administration of telmisartan is not affected by eating, so it can be taken before or after meals, but the specific method of administration still needs to be communicated with the doctor and taken according to medical advice. However, if patients experience dizziness, headache, fatigue, insomnia, anxiety and other uncomfortable reactions while taking the drug, they should stop the drug in time and change the antihypertensive drug after communicating with the clinician.