Losartan 100mg

Generic For: Cozaar

Losartan 100mg (generic Cozaar) is an angiotensin II receptor blocker (ARB) used to lower high blood pressure, reduce stroke risk in certain patients, and protect the kidneys in people with type 2 diabetes. Many people compare losartan vs amlodipine or take losartan and amlodipine together as part of a combination blood pressure plan. After a licensed provider reviews your prescription, your order ships from a licensed U.S. pharmacy.

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Buy Losartan 100mg Online

An angiotensin II receptor blocker (ARB) for high blood pressure, stroke risk reduction, and diabetic kidney disease

Losartan 100mg Quick Facts

Drug classAngiotensin II receptor blocker (ARB)
TreatsHigh blood pressure, stroke risk reduction, diabetic nephropathy
FormTablet
Typical dosingTake 1 tablet by mouth daily.
Prescription requiredYes — prescription only

What Is Losartan 100mg?

Losartan is a prescription blood pressure medication in the angiotensin II receptor blocker (ARB) class, sold under the brand name Cozaar. It works by blocking a hormone that narrows blood vessels, helping vessels relax so blood pressure comes down. Unlike amlodipine, which is a calcium channel blocker, losartan targets the renin-angiotensin system — which is why the two are often compared and sometimes prescribed together. Losartan is also used to protect the kidneys in people with type 2 diabetes and to reduce stroke risk in certain patients with high blood pressure.

What Does Losartan 100mg Treat?

High blood pressure (hypertension) in adults and children 6 years and older
Reduction of stroke risk in patients with hypertension and left ventricular hypertrophy
Diabetic nephropathy (kidney disease) in type 2 diabetes with elevated protein in the urine
Often used with other blood pressure medicines, such as amlodipine or diuretics

Losartan 100mg Dosage

Hypertension: 50 mg by mouth once daily; may increase to 100 mg once daily based on blood pressure response.
Diabetic nephropathy: 50 mg by mouth once daily; increase to 100 mg once daily as needed.
Stroke risk reduction (hypertension with LVH): 50 mg by mouth once daily; titrate up to 100 mg once daily, often with hydrochlorothiazide.

Your prescriber will determine the dose and duration that are right for you. Always follow the directions on your prescription label.

Losartan 100mg Side Effects

Common side effects

  • Dizziness
  • Upper respiratory infection
  • Stuffy nose or nasal congestion
  • Back pain
  • Fatigue
  • Diarrhea
  • Low blood pressure (especially when standing)

Serious side effects

Stop taking this medication and seek medical attention right away if you experience:

  • Fainting or severe lightheadedness
  • Swelling of the face, lips, tongue, or throat (angioedema)
  • High potassium levels (muscle weakness, irregular heartbeat)
  • Signs of kidney problems (little or no urination, swelling)
  • Severe allergic reaction

Warnings & Interactions

Do not use during pregnancy — can cause injury or death to a developing fetus
Do not combine with aliskiren in patients with diabetes
Avoid routine use with ACE inhibitors or other ARBs (dual RAS blockade)
Use caution with potassium supplements, potassium-sparing diuretics, or salt substitutes — risk of high potassium
NSAIDs may reduce losartan's effect and worsen kidney function
May cause low blood pressure in volume- or salt-depleted patients
Monitor kidney function and potassium periodically

Tell your prescriber about all medications, supplements, and health conditions before starting losartan 100mg.

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Frequently Asked Questions

What is the difference between losartan vs amlodipine?

Losartan is an angiotensin II receptor blocker (ARB), while amlodipine is a calcium channel blocker — they lower blood pressure through different mechanisms. Neither is universally "better"; the right choice depends on your health history, kidney function, and how you respond. Your prescriber may select one, the other, or both.

Can you take losartan and amlodipine together?

Yes, losartan and amlodipine are commonly prescribed together when one medication alone doesn't control blood pressure adequately. Because they work in different ways, the combination can be more effective than either drug alone. Only take them together if your prescriber has directed you to.

What is the best time to take losartan and amlodipine?

Both can be taken at any consistent time of day, with or without food. Many people take them in the morning, though some prescribers suggest evening dosing; the most important thing is taking them at the same time each day. Follow your prescriber's specific instructions.

Do I need a prescription for Losartan 100mg?

Yes, losartan is a prescription-only medication in the United States. A licensed healthcare provider must review your health information and issue or verify a valid prescription before we can dispense it.

How does ordering and shipping work?

After you place your order, a licensed provider or pharmacist reviews your prescription and health information. Once approved, your medication is dispensed by a licensed U.S. pharmacy and shipped directly to your door in discreet packaging.

Is losartan the same as Cozaar?

Yes, losartan is the generic version of the brand-name drug Cozaar. Generic losartan contains the same active ingredient at the same strength and is held to the same FDA standards.

What should I avoid while taking losartan?

Avoid salt substitutes containing potassium and potassium supplements unless your prescriber approves them. Limit alcohol, use NSAIDs like ibuprofen cautiously, and tell your prescriber right away if you become pregnant, as losartan should not be used during pregnancy.