Losortan Potassium

Losortan Potassium

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Questions & Answers

Side Effects & Adverse Reactions

Fetal Toxicity

Pregnancy Category D

Use of drugs that act on the renin-angiotensin system during the second and third trimesters of pregnancy reduces renal function and increases fetal and neonatal morbidity and death. Resulting oligohydramnios can be associated with fetal lung hypoplasia and skeletal deformations. Potential neonatal adverse effects include skull hypoplasia, anuria, hypotension, renal failure, and death. When pregnancy is detected, discontinue losartan potassium as soon as possible. These adverse outcomes are usually associated with the use of these drugs in the second and third trimester of pregnancy. Most epidemiologic studies examining fetal abnormalities after exposure to antihypertensive use in the first trimester have not distinguished drugs affecting the renin-angiotensin system from other antihypertensive agents. Appropriate management of maternal hypertension during pregnancy is important to optimize outcomes for both mother and fetus.

In the unusual case that there is no appropriate alternative to therapy with drugs affecting the renin angiotensin system for a particular patient, apprise the mother of the potential risk to the fetus. Perform serial ultrasound examinations to assess the intra-amniotic environment.

If oligohydramnios is observed, discontinue losartan potassium, unless it is considered life-saving for the mother. Fetal testing may be appropriate, based on the week of pregnancy. Patients and physicians should be aware, however, that oligohydramnios may not appear until after the fetus has sustained irreversible injury.

Closely observe infants with histories of in utero exposure to losartan potassium for hypotension, oliguria, and hyperkalemia (see PRECAUTIONS, Pediatric Use).

Losartan potassium has been shown to produce adverse effects in rat fetuses and neonates, including decreased body weight, delayed physical and behavioral development, mortality and renal toxicity. With the exception of neonatal weight gain (which was affected at doses as low as 10 mg/kg/day), doses associated with these effects exceeded 25 mg/kg/day (approximately three times the maximum recommended human dose of 100 mg on a mg/m2 basis). These findings are attributed to drug exposure in late gestation and during lactation. Significant levels of losartan and its active metabolite were shown to be present in rat fetal plasma during late gestation and in rat milk.

Hypotension — Volume-Depleted Patients:

In patients who are intravascularly volume-depleted (e.g., those treated with diuretics), symptomatic hypotension may occur after initiation of therapy with losartan potassium tablets. These conditions should be corrected prior to administration of losartan potassium tablets, or a lower starting dose should be used (see DOSAGE AND ADMINISTRATION).

Legal Issues

There is currently no legal information available for this drug.

FDA Safety Alerts

There are currently no FDA safety alerts available for this drug.

Manufacturer Warnings

There is currently no manufacturer warning information available for this drug.

FDA Labeling Changes

There are currently no FDA labeling changes available for this drug.

Uses

Hypertension:

Losartan potassium tablets, USP are indicated for the treatment of hypertension. It may be used alone or in combination with other antihypertensive agents, including diuretics.

Hypertensive Patients with Left Ventricular Hypertrophy:

Losartan potassium tablets, USP are indicated 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 (see PRECAUTIONS, Race and CLINICAL PHARMACOLOGY, Pharmacodynamics and Clinical Effects, Reduction in the Risk of Stroke, Race).

Nephropathy in Type 2 Diabetic Patients

Losartan potassium tablets, USP are indicated for the treatment of diabetic nephropathy with an elevated serum creatinine and proteinuria (urinary albumin to creatinine ratio ≥ 300 mg/g) in patients with type 2 diabetes and a history of hypertension. In this population, losartan potassium reduces the rate of progression of nephropathy as measured by the occurrence of doubling of serum creatinine or end stage renal disease (need for dialysis or renal transplantation) (see CLINICAL PHARMACOLOGY, Pharmacodynamics and Clinical Effects).

History

There is currently no drug history available for this drug.

Other Information

Losartan potassium is an angiotensin II receptor (type AT1) antagonist. Losartan potassium, a non-peptide molecule, is chemically described as 2-butyl-4-chloro-1-[p-(o-1H-tetrazol-5-ylphenyl)benzyl]imidazole-5-methanol monopotassium salt.

Its molecular formula is C22H22ClKN6O, and its structural formula is:

Structured formula for losartan

Losartan potassium, USP is white to off-white powder with a molecular weight of 461.01. It is freely soluble in water; soluble in isopropyl alcohol; slightly soluble in acetonitrile. Oxidation of the 5-hydroxymethyl group on the imidazole ring results in the active metabolite of losartan.

Each losartan potassium tablet, USP intended for oral administration contains 25 mg or 50 mg or 100 mg of losartan potassium. In addition, each tablet contains the following inactive ingredients: colloidal silica anhydrous, hydroxypropyl cellulose (low substituted), hypromellose, lactose monohydrate, magnesium stearate, maize starch (corn starch), microcrystalline cellulose, polyethylene glycol, sodium starch glycolate, talc and titanium dioxide.

Losartan potassium tablets, USP 25 mg, 50 mg and 100 mg contain potassium in the following amounts: 2.12 mg (0.054 mEq), 4.24 mg (0.108 mEq) and 8.48 mg (0.216 mEq), respectively.

Losortan Potassium Manufacturers


  • State Of Florida Doh Central Pharmacy
    Losortan Potassium (Losartan Potassium) Tablet, Film Coated [State Of Florida Doh Central Pharmacy]
  • Rebel Distributors Corp
    Losortan Potassium (Losartan Potassium) Tablet, Film Coated [Rebel Distributors Corp]
  • Rebel Distributors Corp
    Losortan Potassium (Losartan Potassium) Tablet, Film Coated [Rebel Distributors Corp]
  • Pd-rx Pharmaceuticals, Inc.
    Losortan Potassium (Losartan Potassium) Tablet, Film Coated [Pd-rx Pharmaceuticals, Inc.]
  • Lake Erie Medical Dba Quality Care Products Llc
    Losortan Potassium (Losartan Potassium) Tablet, Film Coated [Lake Erie Medical Dba Quality Care Products Llc]
  • Remedyrepack Inc.
    Losortan Potassium (Losartan Potassium) Tablet, Film Coated [Remedyrepack Inc. ]
  • American Health Packaging
    Losortan Potassium (Losartan Potassium) Tablet, Film Coated [American Health Packaging]
  • Aidarex Pharmaceuticals Llc
    Losortan Potassium (Losartan Potassium) Tablet, Film Coated [Aidarex Pharmaceuticals Llc]
  • Remedyrepack Inc.
    Losortan Potassium (Losartan Potassium) Tablet, Film Coated [Remedyrepack Inc. ]
  • Proficient Rx Lp
    Losortan Potassium (Losartan Potassium) Tablet, Film Coated [Proficient Rx Lp]
  • Bryant Ranch Prepack
    Losortan Potassium (Losartan Potassium) Tablet, Film Coated [Bryant Ranch Prepack]
  • Bryant Ranch Prepack
    Losortan Potassium (Losartan Potassium) Tablet, Film Coated [Bryant Ranch Prepack]
  • Cardinal Health
    Losortan Potassium (Losartan Potassium) Tablet, Film Coated [Cardinal Health]
  • Zydus Pharmaceuticals (Usa) Inc.
    Losortan Potassium (Losartan Potassium) Tablet, Film Coated [Zydus Pharmaceuticals (Usa) Inc.]
  • Medsource Pharmaceuticals
    Losortan Potassium (Losartan Potassium) Tablet, Film Coated [Medsource Pharmaceuticals]

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