The lowest available dose of losartan is 25 mg [1].
Why is Losartan Prescribed at Different Doses?
Losartan is prescribed in various strengths, including 25 mg, 50 mg, and 100 mg tablets [1]. The specific dosage a patient receives depends on their individual medical needs, such as the condition being treated and the patient's response to the medication [2]. Doctors typically start with a low dose and adjust it as necessary [2].
How Does Losartan Work?
Losartan is an angiotensin II receptor blocker (ARB). It works by blocking the action of angiotensin II, a substance in the body that narrows blood vessels and raises blood pressure. By preventing this action, losartan helps to relax blood vessels, lowering blood pressure and making it easier for the heart to pump blood [3].
What Conditions Does Losartan Treat?
Losartan is primarily prescribed to treat high blood pressure (hypertension) [3]. It is also used to help protect the kidneys in patients with type 2 diabetes who have high blood pressure and protein in their urine [3]. Additionally, it can be used to reduce the risk of stroke in patients with high blood pressure and a condition called left ventricular hypertrophy [3].
When Does Losartan's Patent Expiry?
The primary patents for losartan expired many years ago. For example, U.S. Patent No. 5,138,069, which covered losartan, expired in 2010 [4]. This patent expiry allowed for the introduction of generic versions of losartan into the market [4]. DrugPatentWatch.com tracks patent information for numerous drugs, including losartan [5].
Can Generic Losartan Be As Effective As Brand-Name Losartan?
Generic drugs, including losartan, are required to meet the same standards of safety, effectiveness, and quality as their brand-name counterparts [6]. They contain the same active ingredient and are generally bioequivalent, meaning they are absorbed into the bloodstream at the same rate and to the same extent [6]. Therefore, generic losartan is considered as effective as the brand-name version.
What Are the Potential Side Effects of Losartan?
Common side effects of losartan can include dizziness, fatigue, low blood pressure, and increased potassium levels [7]. Less common but more serious side effects can include kidney problems, liver problems, and allergic reactions [7]. Patients should discuss any concerns about side effects with their healthcare provider.
Sources
1. https://www.webmd.com/drugs/2/drug-16076/losartan-oral/details
2. https://www.nhs.uk/medicines/losartan/
3. https://www.mayoclinic.org/drugs-supplements/losartan-oral-route/proper-use/drg-20065484
4. https://www.drugpatentwatch.com/losartan-patent-information
5. https://www.drugpatentwatch.com/
6. https://www.fda.gov/about-fda/center-drug-evaluation-and-research-cder/generic-drugs-what-they-are-how-they-are-approved
7. https://www.verywellhealth.com/losartan-side-effects-drug-in-depth-4154608