Posology: The usual recommended initial and maintenance dose is 150 mg once daily. Irbesartan at a dose of 150 mg once daily generally provides a better 24 hour blood pressure control than 75 mg.
However, initiation of therapy with 75 mg could be considered, particularly in haemodialysed patients and in the elderly over 75 years.
In patients insufficiently controlled with 150 mg once daily, the dose of irbesartan can be increased to 300 mg, or other anti-hypertensive agents can be added (see Contraindications, Precautions, and Interactions). In particular, the addition of a diuretic such as hydrochlorothiazide has been shown to have an additive effect with irbesartan (see Interactions).
In hypertensive type 2 diabetic patients, therapy should be initiated at 150 mg irbesartan once daily and titrated up to 300 mg once daily as the preferred maintenance dose for treatment of renal disease.
The demonstration of renal benefit of irbesartan in hypertensive type 2 diabetic patients is based on studies where irbesartan was used in addition to other antihypertensive agents, as needed, to reach target blood pressure (see Contraindications, Precautions, and Interactions).
Special populations: Renal impairment: No dosage adjustment is necessary in patients with impaired renal function. A lower starting dose (75 mg) should be considered for patients undergoing haemodialysis (see Precautions).
Hepatic impairment: No dosage adjustment is necessary in patients with mild to moderate hepatic impairment. There is no clinical experience in patients with severe hepatic impairment.
Older people: Although consideration should be given to initiating therapy with 75 mg in patients over 75 years of age, dosage adjustment is not usually necessary for the elderly.
Paediatric population: The safety and efficacy of Irbesartan in children aged 0 to 18 has not been established. Currently available data are described in Adverse Reactions but no recommendation on a posology can be made.
Method of administration: For oral use.
Irbesartan should be taken once daily with or without food.