Displaying 39 results of Telmisartan Impurities Telmisartan is an angiotensin II receptor blocker used to treat hypertension and reduce the risk of cardiovascular events. However, during the manufacturing process, impurities can be introduced. These impurities can have harmful effects on human health and must be closely monitored and controlled. Common impurities found in Telmisartan include diastereomeric impurities, related substances, and residual solvents. Strict quality control measures must be in place to ensure the safety and efficacy of Telmisartan.