Correct dosage will vary from patient to patient, depending on the condition, their health, and their medical history. As an example only, a normal dose is often from 20mg to 40mg of Cresar (Telmisartan) taken once per day. The effects of the treatment are usually seen after approximately 2 weeks of treatment, and the full effects after 4 weeks. Patients can dose either both on an empty stomach, or alongside meals. Aim to dose at the same time each day.