Hypersensitivity to irbesartan, or any component of the product; Pregnancy; Concomitant use with aliskiren in patients with diabetes mellitus or renal impairment [glomerular filtration rate (GFR) <60 mL/min/1.73 m2]; Concomitant use with angiotensin-converting enzyme (ACE) inhibitors in patients with diabetic nephropathy.