Answer
Telmisartan relaxes blood vessels by blocking angiotensin II, while hydrochlorothiazide helps the kidneys remove sodium and water.
Sources for this answer
- Telmisartan/Hydrochlorothiazide Glenmark 40 mg/12.5 mg tablets — Current selected SmPCemc · Summary of Product Characteristics
General medicine information. Follow the instructions for your own medicine and speak to a pharmacist or clinician about your individual circumstances.