FDA label a55f0620-ca4d-4f3e-b7da-e98576d63e2a
openFDA label record#
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Verified complete openFDA source JSON
- SPL set ID
- 51c30548-81c9-4b56-ade6-2e56a3fe828e
- SPL ID
- a55f0620-ca4d-4f3e-b7da-e98576d63e2a
- Version
- 5
- Effective date
- 2025-06-01
- Source export date
- 2026-08-01
- Source partition
- 13
- Source file
- https://download.open.fda.gov/drug/label/drug-label-0013-of-0014.json.zip
- Source object key
- raw/openfda/drug-label/2026-08-01/63703fa640102c69d41ceeb8d73f46d0a0be448587814b2aeca60b43bed7e054/drug-label-0013-of-0014.json.zip
- Source manifest SHA-256
- bdd1454d0606b622b70458a306b8a10d8a8787db06fd9f46e69c7f7a4524b630
- Import run
- 20260801T225920Z
- Imported at
- 2026-08-01 23:38:48
Harmonized identifier links#
Every typed identifier imported from the complete openFDA harmonization object is paginated here; values are not reduced to a first match.
| Type | Scope | Identifier | Source field |
|---|---|---|---|
| spl id | a55f0620-ca4d-4f3e-b7da-e98576d63e2a | id | |
| spl set id | 51c30548-81c9-4b56-ade6-2e56a3fe828e | set_id |
Boxed warning cross-check#
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WARNING: FETAL TOXICITY • When pregnancy is detected, discontinue Losartan Potassium and Hydrochlorothiazide Tablets as soon as possible. • Drugs that act directly on the renin-angiotensin system can cause injury and death to the developing fetus. See WARNINGS, Fetal Toxicity .
Warnings cross-check#
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warnings
WARNINGS 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 and Hydrochlorothiazide Tablets 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 and Hydrochlorothiazide Tablets, 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 and Hydrochlorothiazide Tablets for hypotension, oliguria, and hyperkalemia (see PRECAUTIONS, Pediatric Use ). There was no evidence of teratogenicity in rats or rabbits treated with a maximum losartan potassium dose of 10 mg/kg/day in combination with 2.5 mg/kg/day of hydrochlorothiazide. At these dosages, respective exposures (AUCs) of losartan, its active metabolite, and hydrochlorothiazide in rabbits were approximately 5, 1.5, and 1.0 times those achieved in humans with 100 mg losartan in combination with 25 mg hydrochlorothiazide. AUC values for losartan, its active metabolite and hydrochlorothiazide, extrapolated from data obtained with losartan administered to rats at a dose of 50 mg/kg/day in combination with 12.5 mg/kg/day of hydrochlorothiazide, were approximately 6, 2, and 2 times greater than those achieved in humans with 100 mg of losartan in combination with 25 mg of hydrochlorothiazide. Fetal toxicity in rats, as evidenced by a slight increase in supernumerary ribs, was observed when females were treated prior to and throughout gestation with 10 mg/kg/day losartan in combination with 2.5 mg/kg/day hydrochlorothiazide. As also observed in studies with losartan alone, adverse fetal and neonatal effects, including decreased body weight, renal toxicity, and mortality, occurred when pregnant rats were treated during late gestation and/or lactation with 50 mg/kg/day losartan in combination with 12.5 mg/kg/day hydrochlorothiazide. Respective AUCs for losartan, its active metabolite and hydrochlorothiazide at these dosages in rats were approximately 35, 10 and 10 times greater than those achieved in humans with the administration of 100 mg of losartan in combination with 25 mg hydrochlorothiazide. When hydrochlorothiazide was administered without losartan to pregnant mice and rats during their respective periods of major organogenesis, at doses up to 3000 and 1000 mg/kg/day, respectively, there was no evidence of harm to the fetus. Thiazides cross the placental barrier and appear in cord blood. There is a risk of fetal or neonatal jaundice, thrombocytopenia, and possibly other adverse reactions that have occurred in adults. 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 and Hydrochlorothiazide Tablets. This condition should be corrected prior to administration of Losartan Potassium and Hydrochlorothiazide Tablets (see DOSAGE AND ADMINISTRATION ). Impaired Hepatic Function Losartan Potassium and Hydrochlorothiazide Losartan Potassium and Hydrochlorothiazide Tablets are not recommended for patients with hepatic impairment who require titration with losartan. The lower starting dose of losartan recommended for use in patients with hepatic impairment cannot be given using Losartan Potassium and Hydrochlorothiazide Tablets. Hydrochlorothiazide Thiazides should be used with caution in patients with impaired hepatic function or progressive liver disease, since minor alterations of fluid and electrolyte balance may precipitate hepatic coma. Hypersensitivity Reaction Hypersensitivity reactions to hydrochlorothiazide may occur in patients with or without a history of allergy or bronchial asthma, but are more likely in patients with such a history. Systemic Lupus Erythematosus Thiazide diuretics have been reported to cause exacerbation or activation of systemic lupus erythematosus. Lithium Interaction Lithium generally should not be given with thiazides. Monitor serum lithium levels in patients receiving lithium and hydrochlorothiazide (see PRECAUTIONS, Drug Interactions , Hydrochlorothiazide , Lithium ). Acute Myopia and Secondary Angle-Closure Glaucoma Hydrochlorothiazide, a sulfonamide, can cause an idiosyncratic reaction, resulting in acute transient myopia and acute angle-closure glaucoma. Symptoms include acute onset of decreased visual acuity or ocular pain and typically occur within hours to weeks of drug initiation. Untreated acute angle-closure glaucoma can lead to permanent vision loss. The primary treatment is to discontinue hydrochlorothiazide as rapidly as possible. Prompt medical or surgical treatments may need to be considered if the intraocular pressure remains uncontrolled. Risk factors for developing acute angle-closure glaucoma may include a history of sulfonamide or penicillin allergy.
Adverse reactions cross-check#
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adverse reactions
ADVERSE REACTIONS Losartan potassium and hydrochlorothiazide has been evaluated for safety in 858 patients treated for essential hypertension and 3889 patients treated for hypertension and left ventricular hypertrophy. In clinical trials with losartan potassium and hydrochlorothiazide, no adverse experiences peculiar to this combination have been observed. Adverse experiences have been limited to those that were reported previously with losartan potassium and/or hydrochlorothiazide. The overall incidence of adverse experiences reported with the combination was comparable to placebo. In general, treatment with losartan potassium and hydrochlorothiazide was well tolerated. For the most part, adverse experiences have been mild and transient in nature and have not required discontinuation of therapy. In controlled clinical trials, discontinuation of therapy due to clinical adverse experiences was required in only 2.8% and 2.3% of patients treated with the combination and placebo, respectively. In these double-blind controlled clinical trials, the following adverse experiences reported with losartan and hydrochlorothiazide occurred in ≥1 percent of patients, and more often on drug than placebo, regardless of drug relationship: Table Losartan Potassium and Hydrochlorothiazide (n=858) Placebo (n=173) Body as a Whole Abdominal pain 1.2 0.6 Edema/swelling 1.3 1.2 Cardiovascular Palpitation 1.4 0.0 Musculoskeletal Back pain 2.1 0.6 Nervous/Psychiatric Dizziness 5.7 2.9 Respiratory Cough 2.6 2.3 Sinusitis 1.2 0.6 Upper respiratory infection 6.1 4.6 Skin Rash 1.4 0.0 The following adverse events were also reported at a rate of 1% or greater, but were as, or more, common in the placebo group in studies of essential hypertension: asthenia/fatigue, diarrhea, nausea, headache, bronchitis, pharyngitis. Adverse events occurred at about the same rates in men and women. Adverse events were somewhat more frequent in the elderly compared to non-elderly patients and somewhat more frequent in Blacks compared to non-Blacks for both the losartan and hydrochlorothiazide and the control groups. A patient with known hypersensitivity to aspirin and penicillin, when treated with losartan potassium, was withdrawn from study due to swelling of the lips and eyelids and facial rash, reported as angioedema, which returned to normal 5 days after therapy was discontinued. Superficial peeling of palms and hemolysis were reported in one subject treated with losartan potassium. Losartan Potassium Other adverse experiences that have been reported with losartan, without regard to causality, are listed below: Body as a Whole: chest pain, facial edema, fever, orthostatic effects, syncope; Cardiovascular: angina pectoris, arrhythmias including atrial fibrillation, sinus bradycardia, tachycardia, ventricular tachycardia and ventricular fibrillation, CVA, hypotension, myocardial infarction, second degree AV block; Digestive: anorexia, constipation, dental pain, dry mouth, dyspepsia, flatulence, gastritis, vomiting; General disorders and administration site conditions: malaise; Hematologic: anemia; Metabolic: gout; Musculoskeletal: arm pain, arthralgia, arthritis, fibromyalgia, hip pain, joint swelling, knee pain, leg pain, muscle cramps, muscle weakness, musculoskeletal pain, myalgia, shoulder pain, stiffness; Nervous System/Psychiatric: anxiety, anxiety disorder, ataxia, confusion, depression, dream abnormality, hypesthesia, insomnia, libido decreased, memory impairment, migraine, nervousness, panic disorder, paresthesia, peripheral neuropathy, sleep disorder, somnolence, tremor, vertigo; Respiratory: dyspnea, epistaxis, nasal congestion, pharyngeal discomfort, respiratory congestion, rhinitis, sinus disorder; Skin: alopecia, dermatitis, dry skin, ecchymosis, erythema, flushing, photosensitivity, pruritus, sweating, urticaria; Special Senses: blurred vision, burning/stinging in the eye, conjunctivitis, decrease in visual acuity, taste perversion, tinnitus; Urogenital: impotence, nocturia, urinary frequency, urinary tract infection. Hydrochlorothiazide Other adverse experiences that have been reported with hydrochlorothiazide, without regard to causality, are listed below: Body as a Whole: weakness; Digestive: pancreatitis, jaundice (intrahepatic cholestatic jaundice), sialadenitis, cramping, gastric irritation; Hematologic: aplastic anemia, agranulocytosis, leukopenia, hemolytic anemia, thrombocytopenia; Hypersensitivity: purpura, photosensitivity, urticaria, necrotizing angiitis (vasculitis and cutaneous vasculitis), fever, respiratory distress including pneumonitis and pulmonary edema; Metabolic: hyperglycemia, glycosuria, hyperuricemia; Musculoskeletal: muscle spasm; Nervous System/Psychiatric: restlessness; Renal: renal failure, renal dysfunction, interstitial nephritis; Skin: erythema multiforme including Stevens-Johnson syndrome, exfoliative dermatitis including toxic epidermal necrolysis; Special Senses: transient blurred vision, xanthopsia. Persistent dry cough (with an incidence of a few percent) has been associated with ACE-inhibitor use and in practice can be a cause of discontinuation of ACE-inhibitor therapy. Two prospective, parallel-group, double-blind, randomized, controlled trials were conducted to assess the effects of losartan on the incidence of cough in hypertensive patients who had experienced cough while receiving ACE-inhibitor therapy. Patients who had typical ACE-inhibitor cough when challenged with lisinopril, whose cough disappeared on placebo, were randomized to losartan 50 mg, lisinopril 20 mg, or either placebo (one study, n=97) or 25 mg hydrochlorothiazide (n=135). The double-blind treatment period lasted up to 8 weeks. The incidence of cough is shown below. Table *Demographics = (89% caucasian, 64% female) † Demographics = (90% caucasian, 51% female) Study 1* HCTZ Losartan Lisinopril Cough 25% 17% 69% Study 2 † Placebo Losartan Lisinopril Cough 35% 29% 62% These studies demonstrate that the incidence of cough associated with losartan therapy, in a population that all had cough associated with ACE-inhibitor therapy, is similar to that associated with hydrochlorothiazide or placebo therapy. Cases of cough, including positive re-challenges, have been reported with the use of losartan in postmarketing experience. Severe Hypertension: In a clinical study in patients with severe hypertension (SiDBP ≥110 mmHg), the overall pattern of adverse events reported through six weeks of follow-up was similar in patients treated with Losartan Potassium and Hydrochlorothiazide Tablets as initial therapy and in patients treated with losartan as initial therapy. There were no reported cases of syncope in either treatment group. There were 2 (0.6%) and 0 (0.0%) cases of hypotension reported in the group treated with Losartan Potassium and Hydrochlorothiazide Tablets and the group treated with losartan, respectively. There were 3 (0.8%) and 2 (1.2%) cases of increased serum creatinine (>0.5 mg/dL) in the group treated with Losartan Potassium and Hydrochlorothiazide Tablets and the group treated with losartan, respectively, during the same time period (See CLINICAL PHARMACOLOGY, Pharmacodynamics and Clinical Effects , Severe Hypertension .) Postmarketing Experience The following additional adverse reactions have been reported in postmarketing experience: Digestive : Hepatitis has been reported rarely in patients treated with losartan. Hemic : Thrombocytopenia. Hypersensitivity : Angioedema, including swelling of the larynx and glottis, causing airway obstruction and/or swelling of the face, lips, pharynx, and/or tongue has been reported rarely in patients treated with losartan; some of these patients previously experienced angioedema with other drugs including ACE inhibitors. Vasculitis, including Henoch-Schonlein purpura, has been reported with losartan. Anaphylactic reactions have been reported. Metabolic and Nutrition : Hyperkalemia, hyponatremia have been reported with losartan. Musculoskeletal : Rare cases of rhabdomyolysis have been reported in patients receiving angiotensin II receptor blockers. Respiratory : Dry cough (see above) has been reported with losartan. Skin : Erythroderma has been reported with losartan. Laboratory Test Findings In controlled clinical trials, clinically important changes in standard laboratory parameters were rarely associated with administration of Losartan Potassium and Hydrochlorothiazide Tablets. Creatinine , Blood Urea Nitrogen : Minor increases in blood urea nitrogen (BUN) or serum creatinine were observed in 0.6 and 0.8 percent, respectively, of patients with essential hypertension treated with Losartan Potassium and Hydrochlorothiazide Tablets alone. No patient discontinued taking Losartan Potassium and Hydrochlorothiazide Tablets due to increased BUN. One patient discontinued taking Losartan Potassium and Hydrochlorothiazide Tablets due to a minor increase in serum creatinine. Hemoglobin and Hematocrit : Small decreases in hemoglobin and hematocrit (mean decreases of approximately 0.14 grams percent and 0.72 volume percent, respectively) occurred frequently in patients treated with Losartan Potassium and Hydrochlorothiazide Tablets alone, but were rarely of clinical importance. No patients were discontinued due to anemia. Liver Function Tests: Occasional elevations of liver enzymes and/or serum bilirubin have occurred. In patients with essential hypertension treated with Losartan Potassium and Hydrochlorothiazide Tablets alone, no patients were discontinued due to these laboratory adverse experiences. Serum Electrolytes : See PRECAUTIONS .
adverse reactions table
<table ID="_RefID71" width="100%"><caption>Table </caption><col width="46%"/><col width="39%"/><col width="15%"/><tbody><tr><td styleCode="Botrule Toprule " valign="top"/><td align="center" styleCode="Botrule Toprule " valign="top"><paragraph>Losartan Potassium and Hydrochlorothiazide (n=858) </paragraph></td><td align="center" styleCode="Botrule Toprule " valign="top"><paragraph> Placebo (n=173) </paragraph></td></tr><tr><td valign="top"><paragraph><content styleCode="italics">Body as a Whole</content> </paragraph></td><td valign="top"/><td valign="top"/></tr><tr><td valign="top"><paragraph> Abdominal pain </paragraph></td><td align="center" valign="top"><paragraph>1.2 </paragraph></td><td align="center" valign="top"><paragraph>0.6 </paragraph></td></tr><tr><td valign="top"><paragraph> Edema/swelling </paragraph></td><td align="center" valign="top"><paragraph>1.3 </paragraph></td><td align="center" valign="top"><paragraph>1.2 </paragraph></td></tr><tr><td valign="top"/><td valign="top"/><td valign="top"/></tr><tr><td valign="top"><paragraph><content styleCode="italics">Cardiovascular</content> </paragraph></td><td valign="top"/><td valign="top"/></tr><tr><td valign="top"><paragraph> Palpitation </paragraph></td><td align="center" valign="top"><paragraph>1.4 </paragraph></td><td align="center" valign="top"><paragraph>0.0 </paragraph></td></tr><tr><td valign="top"/><td valign="top"/><td valign="top"/></tr><tr><td valign="top"><paragraph><content styleCode="italics">Musculoskeletal </content> </paragraph></td><td valign="top"/><td valign="top"/></tr><tr><td valign="top"><paragraph> Back pain </paragraph></td><td align="center" valign="top"><paragraph>2.1 </paragraph></td><td align="center" valign="top"><paragraph>0.6 </paragraph></td></tr><tr><td valign="top"/><td valign="top"/><td valign="top"/></tr><tr><td valign="top"><paragraph><content styleCode="italics">Nervous/Psychiatric</content> </paragraph></td><td valign="top"/><td valign="top"/></tr><tr><td valign="top"><paragraph> Dizziness </paragraph></td><td align="center" valign="top"><paragraph>5.7 </paragraph></td><td align="center" valign="top"><paragraph>2.9 </paragraph></td></tr><tr><td valign="top"/><td valign="top"/><td valign="top"/></tr><tr><td valign="top"><paragraph><content styleCode="italics">Respiratory</content> </paragraph></td><td valign="top"/><td valign="top"/></tr><tr><td valign="top"><paragraph> Cough </paragraph></td><td align="center" valign="top"><paragraph>2.6 </paragraph></td><td align="center" valign="top"><paragraph>2.3 </paragraph></td></tr><tr><td valign="top"><paragraph> Sinusitis </paragraph></td><td align="center" valign="top"><paragraph>1.2 </paragraph></td><td align="center" valign="top"><paragraph>0.6 </paragraph></td></tr><tr><td valign="top"><paragraph> Upper respiratory infection </paragraph></td><td align="center" valign="top"><paragraph>6.1 </paragraph></td><td align="center" valign="top"><paragraph>4.6 </paragraph></td></tr><tr><td valign="top"/><td valign="top"/><td valign="top"/></tr><tr><td valign="top"><paragraph><content styleCode="italics">Skin</content> </paragraph></td><td valign="top"/><td valign="top"/></tr><tr><td styleCode="Botrule " valign="top"><paragraph> Rash </paragraph></td><td align="center" styleCode="Botrule " valign="top"><paragraph>1.4 </paragraph></td><td align="center" styleCode="Botrule " valign="top"><paragraph>0.0 </paragraph></td></tr></tbody></table>
adverse reactions table
<table ID="_RefID267" width="100%"><caption>Table </caption><col width="25%"/><col width="25%"/><col width="25%"/><col width="25%"/><tfoot><tr><td align="left" colspan="4" valign="top">*Demographics = (89% caucasian, 64% female) </td></tr><tr><td align="left" colspan="4" valign="top"><sup>†</sup> Demographics = (90% caucasian, 51% female) </td></tr></tfoot><tbody><tr><td styleCode="Botrule Toprule " valign="top"><paragraph>Study 1* </paragraph></td><td styleCode="Botrule Toprule " valign="top"><paragraph>HCTZ </paragraph></td><td styleCode="Botrule Toprule " valign="top"><paragraph>Losartan </paragraph></td><td styleCode="Botrule Toprule " valign="top"><paragraph>Lisinopril </paragraph></td></tr><tr><td valign="top"><paragraph>Cough </paragraph></td><td valign="top"><paragraph>25% </paragraph></td><td valign="top"><paragraph>17% </paragraph></td><td valign="top"><paragraph>69% </paragraph></td></tr><tr><td valign="top"/><td valign="top"/><td valign="top"/><td valign="top"/></tr><tr><td styleCode="Botrule " valign="top"><paragraph>Study 2<sup>†</sup> </paragraph></td><td styleCode="Botrule " valign="top"><paragraph>Placebo </paragraph></td><td styleCode="Botrule " valign="top"><paragraph>Losartan </paragraph></td><td styleCode="Botrule " valign="top"><paragraph>Lisinopril </paragraph></td></tr><tr><td styleCode="Botrule " valign="top"><paragraph>Cough </paragraph></td><td styleCode="Botrule " valign="top"><paragraph>35% </paragraph></td><td styleCode="Botrule " valign="top"><paragraph>29% </paragraph></td><td styleCode="Botrule " valign="top"><paragraph>62% </paragraph></td></tr></tbody></table>