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CompletedNCT05090449Updated Oct 22, 2021

Non-interaction Study of Chlorthalidone and Losartan in Fixed Combination, in Healthy Subjects, Under Fasting Conditions

A Phase 1 interventional study of Chlorthalidone (HIGROTON® 50) and Losartan (COZZAR®) in Healthy, sponsored by Laboratorios Silanes S.A. de C.V.. Completed at 1 site in Mexico. Open to participants aged 18 Years to 55 Years, including healthy volunteers. Per ClinicalTrials.gov, last updated 2021-10-22.

Sponsored by Laboratorios Silanes S.A. de C.V. · Phase 1, Interventional, and Treatment

From the registry’s dates

  • Registered 2 years 5 months after the study started (first participant enrolled May 2019, registered Oct 2021).
Phase
Phase 1
Study type
Interventional
Enrollment
36
Allocation
Randomized
Ages
18 Years to 55 Years
Sex
All
01

Study summary

Monocentric study of no pharmacokinetic interaction between chlorthalidone and losartan, with an open, randomized, single-dose design with four periods, four sequences and crossover in healthy volunteers, under fasting conditions, administered in fixed combination (Test product of Laboratorios Silanes, SA de CV) against the individual components administered jointly and separately (Higroton® 50, a product of Sandoz, SA de CV and Cozaar® , a product of Schering-Plow, SA de CV)

Read the detailed description

The study was designed to recruit 36 healthy subjects, which were randomized for this study contemplating losses. All the volunteers whose data allowed at least one comparison to be made were included in the corresponding statistical analysis. The objective was to statistically compare the bioavailability of chlorthalidone (at normalized dose) and losartan potassium, in a non-interaction pharmacokinetic study after single-dose oral administration of a product with the fixed combination of active ingredients with respect to the individual components administered together and separately in healthy fasting volunteers. As a secondary objective, the tolerability of the presentations was evaluated based on the registry of adverse events at the end of the four study periods.

02

Conditions studied

  • Healthy

Keywords

  • Chlorthalidone
  • Losartan
  • No-interaction, pharmacokinetics
  • Fixed-dose combination (FDC)
03

In context

Lead sponsor

Laboratorios Silanes S.A. de C.V. is the lead sponsor of 44 studies on the registry; 1 is open to participants now.

Browse Laboratorios Silanes S.A. de C.V. studies →

Counted across the registry records on this site, refreshed daily.

04

Who can participate

Ages eligible
18 Years to 55 Years
Sexes eligible
All
Accepts healthy volunteers
Yes

Go through the criteria one by one — yes, no or not sure — and take the list to your doctor or the study team. Kept in this browser only.

Inclusion criteria

  • The participation of the subjects was voluntarily in accordance with the guidelines proposed in the General Health Law and their consent will be obtained according to the aforementioned law. Likewise, the standards set by the Declaration of Helsinki, the Brazilian Review and Good Clinical Practices will be maintained.
  • Only healthy male volunteers between 18 and 55 years of age were included. - The body mass index of the subjects should be between 18.0-27.0 kg / m2 according to Quetelet.
  • The volunteers must be healthy, a criterion determined by the results of a complete medical history carried out by the doctors of the Clinical Research site and the laboratory and clinical test (12-lead electrocardiogram) carried out by a certified Clinical Laboratory and / or staff of the Center.
  • The limits of variation allowed within normality in the screening visit was: blood pressure (sitting) from 90 to 129 mm Hg systolic and 60 to 79 mm Hg diastolic, heart rate between 50 and 100 beats per minute and respiratory rate between 14 and 20 breaths per minute according to current SOP with code CLI-DES-008 "Measurement of Vital Signs". Vital signs will be taken after 5 minutes of resting in a sitting position.
  • Subjects willing to practice abstinence as a lifestyle or use of two family planning methods (including barrier methods, non-hormonal intrauterine device or bilateral tubal obstruction, and hysterectomy) during the course of the clinical study and up to 30 days after the last dose.

  • The laboratory and test examinations that will be carried out for the inclusion of the subjects during the selection visit to the study will be:

    1. Complete hematic biometry with differential count: leukocytes, erythrocytes, hemoglobin, hematocrit, mean corpuscular volume, mean corpuscular hemoglobin, mean corpuscular hemoglobin concentration, distribution width of erythrocytes, platelets, neutrophils, lymphocytes, monocytes, eosinophils, basophils.
    2. 27-element blood chemistry: glucose, urea, BUN, creatinine, BUN / creatinine ratio, uric acid, cholesterol, HDL cholesterol, triglyperides, LDL cholesterol, Non-HDL cholesterol, atherogenic index, total proteins, albumin, globulins, A / ratio G, total bilirubin, direct bilirubin, indirect bilirubin, ALT (alanine aminotransferase), AST (aspartate aminotransferase), alkaline phostatase, gamma-glutamyltraspeptidase, LDH, iron, calcium, sodium, potassium, and chlorine.
    3. General urine test. Physical examination (color, appearance, density); chemical examination (pH, leukocytes, nitrites, proteins, glucose, ketones, bilirubin, urobilinogen, hemoglobin); microscopic examination (leukocytes, erythrocytes, dysmorphic erythrocytes, casts, crystals, pavement cells, renal tubular cells, mucoid networks, bacteria, yeast).
    4. Hepatitis B and C serum tests: HBV surface antigen and anti-HCV Antibody.
    5. HIV serum tests: Anti-HIV [Human immunodeficiency virus] 1 and 2 antibodies.
    6. VDRL [Venereal Disease Research Laboratory] serum test.
    7. Urine drug abuse tests (qualitative) at screening visit and approximately 12 hours prior to each drug administration.
    8. Inline alcohol detection test approximately 12 hours before each drug administration.
    9. 12-lead electrocardiogram, which will be taken after 5 minutes of rest in the upright position.

Exclusion criteria

Exclusion Criteria:

  • Volunteers with a history of cardiovascular, kidney, liver, lung, muscle, metabolic, gastrointestinal, neurological, endocrine, hematopoietic, mental illness or other organic abnormalities. As well as those who have had a muscle trauma within the 21 days prior to the start of the study.
  • Volunteers requiring any medication during the course of the study, other than the medication being studied. - Volunteers with a history of dyspepsia, gastritis, esophagitis, duodenal or gastric ulcer. - Volunteers who have been exposed to drugs known as liver enzyme inducers or inhibitors or who have taken potentially toxic drugs within the 30 days prior to the start of the study.
  • Volunteers who have received any medication, including vitamins (with or without a prescription) or herbal remedies 30 days (or 7 half-lives) prior to the start of the study. - Clinically significant abnormalities in the electrocardiographic trace. - Electrolyte disturbances: hypokalemia, hyponatremia, hypercalcemia, and symptomatic hyperuricemia.
  • Volunteers who have been hospitalized for any problem during the six months prior to the start of the study.
  • Subjects who received investigational drugs within 90 days (3 months) prior to the study. - Subjects allergic to study drugs: chlorthalidone and sulphonamide derivatives, as well as losartan.
  • Subjects who have ingested alcohol and / or carbonated beverages and / or containing xanthines (coffee, tea, cocoa, chocolate, mate, cola soft drinks) or who have ingested charcoal-grilled food or grapefruit juice within the previous 10 hours at the beginning of each hospitalization period or subjects who smoked tobacco within 10 hours prior to the start of the study.
  • Subjects who have donated or lost 450 mL or more of blood within the 60 days prior to the start of the study.
  • Subjects with a history of drug abuse and / or alcoholism.
  • Volunteers who require a special diet for any reason or are on a different diet, for example vegetarian.
  • Incapacity of any kind that makes it impossible for the volunteer to understand the nature, objective and possible consequences of the study.
  • Evidence of non-cooperative attitude during the development of the study.
  • Volunteers with positive urine drug abuse test or breath alcohol test.
  • Volunteers who are not registered on the COFEPRIS page.
  • Relationship of subordination between research subjects and researchers.
  • Employees of the Sponsor and / or IFaB.
05

Study design

Phase
Phase 1
Primary purpose
Treatment
Allocation
Randomized
Intervention model
Crossover assignment
Masking
None (open label)
Enrollment
36 participants (actual)

Study arms

  • Active comparator
    A1: Individual formulation of chlorthalidone

    (Higroton 50, product of Sandoz, S.A. de C.V.)

    Drug: Chlorthalidone (HIGROTON® 50)

  • Active comparator
    A2:Individual formulation Losartan

    (COZAAR, product of Schering Plough, S.A. de C.V., S.A. de C.V.)

    Drug: Losartan (COZZAR®)

  • Active comparator
    A3: Co-administration of individual formulations

    Co-administration of individual formulations of chlorthalidone and losartan potassium

    Drug: A1+ A2 Co-administration of Chlorthalidone and Losartan

  • Experimental
    B: Fixed combination of chlorthalidone and losartan potassium

    B: Fixed combination of chlorthalidone and losartan potassium (product of Laboratorios Silanes S.A. de C.V.)

    Drug: Chlorthalidone + Losartan Fixed-Dose combination

Interventions

  • DrugChlorthalidone (HIGROTON® 50)

    Tablets with 50mg of Chlorthalidone, product de Sandoz, S.A. de C.V.

    Also known as: Chlo

  • DrugLosartan (COZZAR®)

    Losartan potassium 100 mg tablet, a product of Schering-Plough, S.A. C.V.

    Also known as: Los

  • DrugA1+ A2 Co-administration of Chlorthalidone and Losartan

    50mg chlorthalidone + 100 mg losartan potassium

    Also known as: Chlo + Los

  • DrugChlorthalidone + Losartan Fixed-Dose combination

    Drug pages: Chlorthalidone · Losartan

    Tablets with fixed combination of Chlorthalidone 25 mg and Losartan Potassium

    Also known as: FDC

06

What researchers measure

Primary outcomes

  1. Maximum observed concentration following the treatment (Cmax)

    Evaluate the fixed dose pharmacokinetics profile of Dexketoprofen-Vitamin B, employing the maximum observed concentration following the treatment (Cmax).

    Time frame: Baseline, 0.333, 0.750, 1.000, 1.250, 1.750, 2.000, 3.000, 4.500, 5.000, 5.500, 6.000, 6.500, 7.000, 8.000, 10.000, 12.000, 18.000, 24.000, 48.000, 72.000, 96.000, 120.000 y 144.000 hours.

  2. The area under the curve from time zero to the last measurable concentration (AUC 0-t)

    Evaluate the fixed dose pharmacokinetics profile of Dexketoprofen-Vitamin B, employing the area under the curve from time zero to the last measurable concentration (AUC 0-t)using the linear trapezoidal method.

    Time frame: Baseline, 0.333, 0.750, 1.000, 1.250, 1.750, 2.000, 3.000, 4.500, 5.000, 5.500, 6.000, 6.500, 7.000, 8.000, 10.000, 12.000, 18.000, 24.000, 48.000, 72.000, 96.000, 120.000 y 144.000 hours.

  3. The area under the curve from time zero to infinity calculated (AUC 0-inf)

    Evaluate the fixed dose pharmacokinetics profile of Dexketoprofen-Vitamin B, employing the area under the curve from time zero to infinity calculated (AUC 0-inf).

    Time frame: Baseline, 0.333, 0.750, 1.000, 1.250, 1.750, 2.000, 3.000, 4.500, 5.000, 5.500, 6.000, 6.500, 7.000, 8.000, 10.000, 12.000, 18.000, 24.000, 48.000, 72.000, 96.000, 120.000 y 144.000 hours.

  4. Time of the maximum measured concentration (Tmax)

    Evaluate the fixed dose pharmacokinetics profile of Dexketoprofen-Vitamin B, employing time of the maximum measured concentration (Tmax).

    Time frame: Baseline, 0.333, 0.750, 1.000, 1.250, 1.750, 2.000, 3.000, 4.500, 5.000, 5.500, 6.000, 6.500, 7.000, 8.000, 10.000, 12.000, 18.000, 24.000, 48.000, 72.000, 96.000, 120.000 y 144.000 hours.

  5. Elimination rate (Ke)

    Evaluate the fixed dose pharmacokinetics profile of Dexketoprofen-Vitamin B, employing the elimination rate (Ke), calculated by log-linear regression of the final phase of elimination.

    Time frame: Baseline, 0.333, 0.750, 1.000, 1.250, 1.750, 2.000, 3.000, 4.500, 5.000, 5.500, 6.000, 6.500, 7.000, 8.000, 10.000, 12.000, 18.000, 24.000, 48.000, 72.000, 96.000, 120.000 y 144.000 hours.

Secondary outcomes

  1. Registry of adverse events of the presentations [Tolerability]

    Determined the tolerability of the presentations based on the registry of adverse events at the end of the four study periods.

    Time frame: 67 days

07

Study locations

1 site
  • Laboratorio Silanes, S.A. de C.V.
    Mexico City, 11000, Mexico
08

References and documents

Publications

  • Bienert A, Brzeziniski R, Szalek E, Dubai V, Grzeskowiak E, Dyderski S, Drobnik L, Wolc A, Olejniczak-Rabinek M. Bioequivalence study of two losartan formulations administered orally in healthy male volunteers. Arzneimittelforschung. 2006;56(11):723-8. doi: 10.1055/s-0031-1296781. PubMed 17220048 ↗
  • Das AK, Dhanure S, Savalia AK, Nayak SK, Tripathy SK. Human bioequivalence evaluation of two losartan potassium tablets under fasting conditions. Indian J Pharm Sci. 2015 Mar-Apr;77(2):190-5. doi: 10.4103/0250-474x.156583. PubMed 26009652 ↗
  • del Castillo D, Campistol JM, Guirado L, Capdevilla L, Martinez JG, Pereira P, Bravo J, Perez R. Efficacy and safety of losartan in the treatment of hypertension in renal transplant recipients. Kidney Int Suppl. 1998 Dec;68:S135-9. doi: 10.1046/j.1523-1755.1998.06827.x. PubMed 9839298 ↗
  • Dudkowski C, Karim A, Munsaka M. Effects of Food Intake on the Pharmacokinetics of Azilsartan Medoxomil and Chlorthalidone Alone and in Fixed-Dose Combination in Healthy Adults. Clin Pharmacol Drug Dev. 2016 Sep;5(5):393-8. doi: 10.1002/cpdd.249. Epub 2016 Mar 4. PubMed 27514506 ↗
  • Mann R, Mackay F, Pearce G, Freemantle S, Wilton L. Losartan: a study of pharmacovigilance data on 14,522 patients. J Hum Hypertens. 1999 Aug;13(8):551-7. doi: 10.1038/sj.jhh.1000880. PubMed 10455478 ↗
  • Pentikis HS, Henderson JD, Tran NL, Ludden TM. Bioequivalence: individual and population compartmental modeling compared to the noncompartmental approach. Pharm Res. 1996 Jul;13(7):1116-21. doi: 10.1023/a:1016083429903. PubMed 8842055 ↗
  • Potvin D, DiLiberti CE, Hauck WW, Parr AF, Schuirmann DJ, Smith RA. Sequential design approaches for bioequivalence studies with crossover designs. Pharm Stat. 2008 Oct-Dec;7(4):245-62. doi: 10.1002/pst.294. PubMed 17710740 ↗
  • Shah JV, Patel DP, Shah PA, Sanyal M, Shrivastav PS. Simultaneous quantification of atenolol and chlorthalidone in human plasma by ultra-performance liquid chromatography-tandem mass spectrometry. Biomed Chromatogr. 2016 Feb;30(2):208-16. doi: 10.1002/bmc.3537. Epub 2015 Jul 7. PubMed 26096961 ↗
  • Zandbergen AA, Baggen MG, Lamberts SW, Bootsma AH, de Zeeuw D, Ouwendijk RJ. Effect of losartan on microalbuminuria in normotensive patients with type 2 diabetes mellitus. A randomized clinical trial. Ann Intern Med. 2003 Jul 15;139(2):90-6. doi: 10.7326/0003-4819-139-2-200307150-00008. PubMed 12859158 ↗

Individual participant data

Plan to share: No

09

Updates

Tracking since Sep 25, 2026
No changes since tracking began. The registry record was last updated on Oct 22, 2021, before this site started recording changes on Sep 25, 2026. Its history is on ClinicalTrials.gov ↗
10

Registry details

Key details

Study ID
NCT05090449
Lead sponsor
Laboratorios Silanes S.A. de C.V.
Responsible party
Sponsor
First posted
Oct 22, 2021
Start date
May 1, 2019
Primary completion
Apr 8, 2020
Completion
May 25, 2020
Last update
Oct 22, 2021

Study contacts

Araceli G Medina Nolasco, M.D
principal investigator · Investigación Farmacológica y Biofarmacéutica, S.A.P.I. de C.V.
Liz J Medina Reyes, M.D
principal investigator · Investigación Farmacológica y Biofarmacéutica, S.A.P.I. de C.V.

Oversight

Data monitoring committee
No
FDA-regulated drug
No
FDA-regulated device
No
View the source record on ClinicalTrials.gov ↗

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Studies of the drugs tested here: Chlorthalidone · Losartan

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