Losartan

Blood pressure

Also known as Cozaar

Losartan is an ARB (angiotensin receptor blocker). It blocks the same vessel-tightening hormone that ACE inhibitors like lisinopril target, just one step further along — which is why it does the same job without causing the famous dry cough. It also helps protect kidneys in people with diabetes.

How to take it

When

Once a day, same time each day.

Food

With or without food.

Avoid

Potassium-based salt substitutes and potassium supplements unless approved — losartan raises potassium. Regular ibuprofen or naproxen can blunt its effect and strain kidneys.

Getting started

Rise slowly from sitting or lying down for the first few days in case of dizziness.

Missed a dose?

Take it when you remember, unless the next dose is close — then skip. One dose at a time, always.

Common side effects

Dizziness, especially at first
Stuffy nose or back pain
Tiredness

Call a doctor if

Swelling of the face, lips, or tongue — emergency
Fainting
Muscle weakness or an irregular heartbeat — can signal high potassium
Very little urination

Educational only. This summary is drawn from public FDA labeling and MedlinePlus and simplified for readability. Your prescription label and your pharmacist always come first — doses and instructions vary from person to person.