If you plan to become pregnant, talk to your doctor about other treatment options for your high blood pressure. have diabetes and are taking a kind of medicine called an angiotensin receptor blocker (ARB) or angiotensin-converting enzyme inhibitor (ACEI). are allergic (hypersensitive) to aliskiren, amlodipine, or other dihydropyridines (calcium-channel blockers, a group of medicines to lower blood