Diovan (Valsartan) is a prescription drug used to treat high blood pressure, congestive heart failure, and heart attack. Pictures of Hyzaar (Losartan drug imprint information, side effects for the patient. There are several warnings and precautions with losartan to be aware of before beginning treatment. For example, you should not take losartan if you are allergic to. When certain medications are taken together, it may result in negative drug interactions. With losartan, an interaction can develop if the drug is taken with. Losartan (Cozaar) is used to treat high blood pressure and reduce the risk of stroke in certain people with heart disease. Includes side effects, interactions and. Losartan (Cozaar), is used to treat hypertension (high blood pressure). It is also used to lower the risk of stroke in some patients with heart disease. Hyzaar official prescribing information for healthcare professionals. Includes: indications, dosage, adverse reactions, pharmacology and more. Learn about Losartan HCTZ (Generic Hyzaar), dosing, proper use and what to know before beginning treatment I don't know this doctor very well as mine has retired, and he is aware of my medical history obviously, and my struggle with weight loss as well as my attempt t WHY is this medicine prescribed? Losartan is used alone or in combination with other medications to treat high blood pressure. Losartan is also used to decrease the. Losartan: learn about side effects, dosage, special precautions, and more on MedlinePlus.