What is Losartan + Hydrochlorothiazide used for?
This drug is used to treat high blood pressure. It is also used to lower the risk of strokes in patients with high blood pressure and an enlarged heart. Lowering high blood pressure helps prevent strokes, heart attacks, and kidney problems. This product contains two medications: losartan and hydrochlorothiazide. Losartan is an angiotensin receptor blocker (ARB) and works by relaxing blood vessels so that blood can flow more easily. Hydrochlorothiazide is a “water pill” (diuretic) that causes you to make more urine, which helps your body get rid of extra salt and water.
How should I take Losartan + Hydrochlorothiazide?
Take this medication by mouth as directed by your doctor, usually once daily with or without food. If this medication causes you to urinate more frequently, it is best to take it at least 4 hours before your bedtime to prevent having to get up to urinate.
If you also take certain drugs to lower your cholesterol (bile acid-binding resins such as cholestyramine or colestipol), take losartan/hydrochlorothiazide at least 4 hours before or at least 4 to 6 hours after these medications.
The dosage is based on your medical condition and response to treatment.
Use this medication regularly to get the most benefit from it. To help you remember, take it at the same time each day. It is important to continue taking this medication even if you feel well. Most people with high blood pressure do not feel sick.
Tell your doctor if your condition does not improve or if it worsens (for example, your blood pressure readings increase).
How do I store Losartan + Hydrochlorothiazide?
Losartan + Hydrochlorothiazide is best stored at room temperature away from direct light and moisture. To prevent drug damage, you should not store Losartan + Hydrochlorothiazide in the bathroom or the freezer. There may be different brands of Losartan + Hydrochlorothiazide that may have different storage needs. It is important to always check the product package for instructions on storage, or ask your pharmacist. For safety, you should keep all medicines away from children and pets.
You should not flush Losartan + Hydrochlorothiazide down the toilet or pour them into a drain unless instructed to do so. It is important to properly discard this product when it is expired or no longer needed. Consult your pharmacist for more details about how to safely discard your product.
Precautions & warnings
What should I know before using Losartan + Hydrochlorothiazide?
Before taking this medication, tell your doctor or pharmacist if you are allergic to losartan or hydrochlorothiazide; or if you have any other allergies. This product may contain inactive ingredients, which can cause allergic reactions or other problems. Talk to your pharmacist for more details.
This drug may make you dizzy. Do not drive, use machinery, or do any activity that requires alertness until you are sure you can perform such activities safely. Limit alcoholic beverages.
Severe sweating, diarrhea, or vomiting can increase the risk for lightheadedness or a serious loss of body water (dehydration). Report prolonged diarrhea or vomiting to your doctor. To prevent dehydration, drink plenty of fluids unless your doctor directs you otherwise.
If you have diabetes, this product may affect your blood sugar. Check your blood sugar regularly as directed and share the results with your doctor. Your doctor may need to adjust your diabetes medication, exercise program, or diet.
This medication may make you more sensitive to the sun. Limit your time in the sun. Avoid tanning booths and sunlamps. Use sunscreen and wear protective clothing when outdoors. Tell your doctor right away if you get sunburned or have skin blisters/redness.
This product may affect your potassium levels. Before using potassium supplements or salt substitutes that contain potassium, consult your doctor or pharmacist.
Before having surgery, tell your doctor or dentist about all the products you use (including prescription drugs, nonprescription drugs, and herbal products).
Older adults may be more sensitive to the side effects of this drug, especially dizziness and change in the amount of urine (kidney problems).
This medication is not recommended for use during pregnancy due to the risk for harm to an unborn baby. Consult your doctor for more details. (See also Warning section.)
It is unknown if losartan passes into breast milk. Hydrochlorothiazide passes into breast milk, but is unlikely to harm a nursing infant. Consult your doctor before breast-feeding.
Is it safe during pregnancy or breast-feeding?
There are no adequate studies in women for determining risk when using this Losartan + Hydrochlorothiazide during pregnancy or while breastfeeding. Please always consult with your doctor to weigh the potential benefits and risks before taking Losartan + Hydrochlorothiazide. Losartan + Hydrochlorothiazide is pregnancy risk category D according to the US Food and Drug Administration (FDA).
FDA pregnancy risk category reference below:
- A=No risk,
- B=No risk in some studies,
- C=There may be some risk,
- D=Positive evidence of risk,
What side effects can occur from Losartan + Hydrochlorothiazide?
Dizziness or lightheadedness may occur as your body adjusts to the medication. If any of these effects persist or worsen, tell your doctor or pharmacist promptly.
To reduce the risk of dizziness and lightheadedness, get up slowly when rising from a sitting or lying position.
Remember that your doctor has prescribed this medication because he or she has judged that the benefit to you is greater than the risk of side effects. Many people using this medication do not have serious side effects.
This product may cause a loss of too much body water (dehydration) and salt/minerals. Tell your doctor right away if you have any symptoms of dehydration or mineral loss, including: extreme thirst, very dry mouth, muscle cramps/weakness, fast/slow/irregular heartbeat, confusion.
Tell your doctor right away if any of these unlikely but serious side effects occur: fainting, decrease in vision, eye pain, symptoms of a high potassium blood level (such as muscle weakness, slow/irregular heartbeat), signs of kidney problems (such as change in the amount of urine).
A very serious allergic reaction to this drug is rare. However, get medical help right away if you notice any symptoms of a serious allergic reaction, including: rash, itching/swelling (especially of the face/tongue/throat), severe dizziness, trouble breathing.
Not everyone experiences these side effects. There may be some side effects not listed above. If you have any concerns about a side-effect, please consult your doctor or pharmacist.
What drugs may interact with Losartan + Hydrochlorothiazide?
Some products that may interact with this drug include: aliskiren, dofetilide, lithium, drugs that may increase the level of potassium in the blood (such as ACE inhibitors including benazepril/lisinopril, birth control pills containing drospirenone).
Some products have ingredients that could raise your blood pressure or worsen your heart failure. Tell your pharmacist what products you are using, and ask how to use them safely (especially cough-and-cold products, diet aids, or NSAIDs such as ibuprofen/naproxen).
This medication may interfere with certain laboratory tests (including parathyroid function), possibly causing false test results. Make sure laboratory personnel and all your doctors know you use this drug.
Losartan + Hydrochlorothiazide may interact with other drugs that you are currently taking, which can change how your drug works or increase your risk for serious side effects. To avoid any potential drug interactions, you should keep a list of all the drugs you are using (including prescription drugs, nonprescription drugs and herbal products) and share it with your doctor and pharmacist. For your safety, do not start, stop, or change the dosage of any drugs without your doctor’s approval.
Does food or alcohol interact with Losartan + Hydrochlorothiazide?
Losartan + Hydrochlorothiazide may interact with food or alcohol by altering the way the drug works or increase the risk for serious side effects. Please discuss with your doctor or pharmacist any potential food or alcohol interactions before using this drug.
What health conditions may interact with Losartan + Hydrochlorothiazide?
Losartan + Hydrochlorothiazide may interact with your health condition. This interaction may worsen your health condition or alter the way the drug works. It is important to always let your doctor and pharmacist know all the health conditions you currently have.
The information provided is not a substitute for any medical advice. You should ALWAYS consult with your doctor or pharmacist before using this Losartan + Hydrochlorothiazide.
What is the dose of Losartan + Hydrochlorothiazide for an adult?
Usual Adult Dose for 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
-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.
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.
Renal Dose Adjustments
Mild to moderate renal dysfunction (CrCl 30 mL/min or greater): No adjustment recommended
Severe renal dysfunction (CrCl less than 30 mL/min): Not recommended
Liver Dose Adjustments
Not recommended as initial therapy
-Patients with a history of angioedema (swelling of the face, lips, throat, and/or tongue) should be closely monitored.
-Monitor serum electrolytes and renal function periodically.
-Females of childbearing age should be informed of the consequences of exposure to this drug during pregnancy; ask these patients to report pregnancies as soon as possible.
-Encourage patients to report any lightheadedness that may occur during treatment initiation and to stop taking this drug until consulting a physician if syncope occurs.
-Dehydration may lead to excess blood pressure reduction; inform patients to contact their healthcare provider if they experience excessive perspiration, vomiting, or diarrhea.
What is the dose of Losartan + Hydrochlorothiazide for a child?
The dosage has not been established in pediatric patients. It may be unsafe for your child. It is always important to fully understand the safety of the drug before using. Please consult with your doctor or pharmacist for more information.
How is Losartan + Hydrochlorothiazide available?
Losartan + Hydrochlorothiazide is available in the following dosage forms and strengths:
- Oral Tablet
What should I do in case of an emergency or overdose?
In case of an emergency or an overdose, call your local emergency services or go to your nearest emergency room.
What should I do if I miss a dose?
If you miss a dose of Losartan + Hydrochlorothiazide, take it as soon as possible. However, if it is almost time for your next dose, skip the missed dose and take your regular dose as scheduled. Do not take a double dose.
Hello Health Group does not provide medical advice, diagnosis or treatment.
Hydrochlorothiazide / Losartan Dosage. https://www.drugs.com/dosage/hydrochlorothiazide-losartan.html. Accessed March 8, 2018.
Losartan-Hydrochlorothiazide. https://www.webmd.com/drugs/2/drug-2626/losartan-hydrochlorothiazide-oral/details. Accessed March 8, 2018.
Review Date: March 23, 2018 | Last Modified: September 12, 2019