Known hypersensitivity to valsartan or to any of the excipients of Diovan.
Pregnancy (see USE IN PREGNANCY & LACTATION).
Concomitant use of angiotensin receptor antagonists (ARBs) - including Diovan - or of angiotensin-converting-enzyme inhibitors (ACEIs) with aliskiren in patients with Type 2 diabetes (see Dual blockade of the RAS under INTERACTIONS).