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Hyzaar

Generic Name: hydrochlorothiazide and losartan (HYE droe KLOR oh THYE a zide and loe SAR tan)
Brand Names: Hyzaar

What is Hyzaar?

Hyzaar contains a combination of hydrochlorothiazide and losartan. Hydrochlorothiazide is a thiazide diuretic (water pill) that helps prevent your body from absorbing too much salt, which can cause fluid retention.

Losartan is an angiotensin II receptor antagonist. Losartan keeps blood vessels from narrowing, which lowers blood pressure and improves blood flow.

Hyzaar is used to treat high blood pressure (hypertension). It is also used to lower the risk of stroke in certain people with heart disease.

Hyzaar may also be used for purposes not listed in this medication guide.

Important information

Do not use Hyzaar if you are pregnant. If you become pregnant, stop taking this medicine and tell your doctor right away.

You should not use this medicine if you are unable to urinate.

If you have diabetes, do not use Hyzaar together with any medication that contains aliskiren (such as Tekturna or Tekamlo).

In rare cases, Hyzaar can cause a condition that results in the breakdown of skeletal muscle tissue, leading to kidney failure. Call your doctor right away if you have unexplained muscle pain, tenderness, or weakness especially if you also have fever, unusual tiredness, and dark colored urine.

Before taking this medicine

You should not use Hyzaar if you are allergic to hydrochlorothiazide or losartan, if you are unable to urinate.

If you have diabetes, do not use Hyzaar together with any medication that contains aliskiren (such as Tekturna or Tekamlo).

You may also need to avoid taking Hyzaar with aliskiren if you have kidney disease.

To make sure Hyzaar is safe for you, tell your doctor if you have ever had:

  • kidney disease;

  • liver disease;

  • congestive heart failure;

  • glaucoma;

  • low or high levels of potassium in your blood;

  • asthma or allergies;

  • high cholesterol or triglyceride levels;

  • gout;

  • lupus;

  • diabetes; or

  • an allergy to penicillin or sulfa drugs.

Do not use Hyzaar if you are pregnant. If you become pregnant, stop taking this medicine and tell your doctor right away. Hydrochlorothiazide and losartan can cause injury or death to the unborn baby if you take the medicine during your second or third trimester.

Hydrochlorothiazide can pass into breast milk and may cause side effects in the nursing baby. You should not breast-feed while using Hyzaar.

How should I take Hyzaar?

Take Hyzaar exactly as prescribed by your doctor. Follow all directions on your prescription label. Your doctor may occasionally change your dose. Do not take this medicine in larger or smaller amounts or for longer than recommended.

Your blood pressure will need to be checked often.

Call your doctor if you have ongoing vomiting or diarrhea, or if you are sweating more than usual. You can easily become dehydrated while taking this medication, which can lead to severely low blood pressure or a serious electrolyte imbalance.

If you need surgery or medical tests, tell the surgeon ahead of time that you are using Hyzaar.

It may take up to 4 weeks for this medication to control your blood pressure. Keep using this medicine as directed, even if you feel well. High blood pressure often has no symptoms. You may need to use blood pressure medication for the rest of your life.

Store Hyzaar at room temperature away from moisture, heat, and light.

Hyzaar dosing information

Usual Adult Dose for Hypertension:

HYPERTENSION:
Hydrochlorothiazide 12.5 to 25 mg-Losartan 50 to 100 mg orally once a day

Maximum dose: Hydrochlorothiazide 25 mg-Losartan 100 mg orally once a day

Comments:
-A patient whose blood pressure is not adequately controlled with hydrochlorothiazide or losartan monotherapy may be switched to hydrochlorothiazide 12.5 mg-losartan 50 mg orally once a day.
-May increase dose if blood pressure remains uncontrolled after about 3 weeks.

Use: Treatment of hypertension. This drug is not indicated for initial therapy except when hypertension is severe enough that the benefit of achieving prompt blood pressure control exceeds the risk of initiating combination therapy.

SEVERE HYPERTENSION:
Initial treatment: Hydrochlorothiazide 12.5 mg-Losartan 50 mg orally once a day; if blood pressure remains uncontrolled after 2 to 4 weeks, may initiate maximum dose.

Maximum dose: Hydrochlorothiazide 25 mg-Losartan 100 mg orally once a day

HYPERTENSION WITH LEFT VENTRICULAR HYPERTROPHY:
Initial therapy: Losartan monotherapy; if blood pressure remains uncontrolled, may initiate this drug.

Add-on therapy: Hydrochlorothiazide 12.5 mg-Losartan 50 mg orally once a day; if blood pressure remains uncontrolled, initiate hydrochlorothiazide 12.5 mg-losartan 100 mg orally once a day, followed by hydrochlorothiazide 25 mg-losartan 100 mg orally once a day, if needed.

Use: To reduce the risk of stroke in patients with hypertension and left ventricular hypertrophy, but there is evidence that this benefit does not apply to Black patients.

Dosage Information (in more detail)

What happens if I miss a dose?

Take the missed dose as soon as you remember. Skip the missed dose if it is almost time for your next scheduled dose. Do not take extra medicine to make up the missed dose.

What happens if I overdose?

Seek emergency medical attention or call the Poison Help line at 1-800-222-1222.

What should I avoid while taking Hyzaar?

If you also take cholestyramine or colestipol, avoid taking these medications within 4 hours before or 4 hours after you take Hyzaar.

Do not use potassium supplements or salt substitutes while you are taking Hyzaar, unless your doctor has told you to.

Drinking alcohol can further lower your blood pressure and may cause side effects.

Avoid becoming overheated or dehydrated during exercise, in hot weather, or by not drinking enough fluids.

Hyzaar side effects

Get emergency medical help if you have signs of an allergic reaction to Hyzaar: hives; difficulty breathing; swelling of your face, lips, tongue, or throat.

In rare cases, Hyzaar can cause a condition that results in the breakdown of skeletal muscle tissue, leading to kidney failure. Call your doctor right away if you have unexplained muscle pain, tenderness, or weakness especially if you also have fever, unusual tiredness, and dark colored urine.

Also call your doctor at once if you have:

  • eye pain, vision problems;

  • a light-headed feeling, like you might pass out;

  • jaundice (yellowing of the skin or eyes);

  • easy bruising, unusual bleeding;

  • kidney problems - little or no urination, painful or difficult urination, swelling in your feet or ankles, feeling tired or short of breath;

  • low levels of sodium in the body - headache, confusion, slurred speech, severe weakness, vomiting, loss of coordination, feeling unsteady;

  • high potassium - nausea, slow or unusual heart rate, weakness, loss of movement; or

  • low potassium - leg cramps, constipation, irregular heartbeats, fluttering in your chest, increased thirst or urination, numbness or tingling, muscle weakness or limp feeling.

Common Hyzaar side effects may include:

  • dizziness;

  • cold symptoms such as stuffy nose, sneezing, sore throat;

  • cough; or

  • back pain.

This is not a complete list of side effects and others may occur. Call your doctor for medical advice about side effects. You may report side effects to FDA at 1-800-FDA-1088.

Side effects (in more detail)

What other drugs will affect Hyzaar?

Tell your doctor about all your current medicines and any you start or stop using, especially:

  • any other blood pressure medications;

  • insulin or oral diabetes medicine;

  • lithium; or

  • NSAIDs (nonsteroidal anti-inflammatory drugs) - aspirin, ibuprofen (Advil, Motrin), naproxen (Aleve), celecoxib, diclofenac, indomethacin, meloxicam, and others.

This list is not complete. Other drugs may interact with hydrochlorothiazide and losartan, including prescription and over-the-counter medicines, vitamins, and herbal products. Not all possible interactions are listed in this medication guide.

Where can I get more information?

  • Your pharmacist can provide more information about Hyzaar.
  • Remember, keep this and all other medicines out of the reach of children, never share your medicines with others, and use Hyzaar only for the indication prescribed.
  • Disclaimer: Every effort has been made to ensure that the information provided by Cerner Multum, Inc. ('Multum') is accurate, up-to-date, and complete, but no guarantee is made to that effect. Drug information contained herein may be time sensitive. Multum information has been compiled for use by healthcare practitioners and consumers in the United States and therefore Multum does not warrant that uses outside of the United States are appropriate, unless specifically indicated otherwise. Multum's drug information does not endorse drugs, diagnose patients or recommend therapy. Multum's drug information is an informational resource designed to assist licensed healthcare practitioners in caring for their patients and/or to serve consumers viewing this service as a supplement to, and not a substitute for, the expertise, skill, knowledge and judgment of healthcare practitioners. The absence of a warning for a given drug or drug combination in no way should be construed to indicate that the drug or drug combination is safe, effective or appropriate for any given patient. Multum does not assume any responsibility for any aspect of healthcare administered with the aid of information Multum provides. The information contained herein is not intended to cover all possible uses, directions, precautions, warnings, drug interactions, allergic reactions, or adverse effects. If you have questions about the drugs you are taking, check with your doctor, nurse or pharmacist.

Copyright 1996-2017 Cerner Multum, Inc. Version: 13.01.

Date modified: September 07, 2017
Last reviewed: July 18, 2017

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