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

Study Overview
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Brief Summary
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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)

Detailed Description
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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.

Official Title
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No Pharmacokinetic Interaction Between Chlorthalidone and Losartan, in Healthy Volunteers Under Fasting Conditions, Administered in Fixed Combination Against Individual Components Administered Jointly and Separately

Conditions
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Healthy

Intervention / Treatment
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* Drug: Chlorthalidone (HIGROTON® 50)
* Drug: Losartan (COZZAR®)
* Drug: A1+ A2 Co-administration of Chlorthalidone and Losartan
* Drug: Chlorthalidone + Losartan Fixed-Dose combination


Participation Criteria
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Eligibility Criteria
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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: 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. 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. 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). Hepatitis B and C serum tests: HBV surface antigen and anti-HCV Antibody. HIV serum tests: Anti-HIV [Human immunodeficiency virus] 1 and 2 antibodies. VDRL [Venereal Disease Research Laboratory] serum test. Urine drug abuse tests (qualitative) at screening visit and approximately 12 hours prior to each drug administration. Inline alcohol detection test approximately 12 hours before each drug administration. 12-lead electrocardiogram, which will be taken after 5 minutes of rest in the upright position. 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.

Ages Eligible for Study
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Minimum Age: 18 Years
Maximum Age: 55 Years

Sexes Eligible for Study
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All

Accepts Healthy Volunteers
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Accepts Healthy Volunteers

Study Plan
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How is the study designed?
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Design Details

Primary Purpose: Treatment
Allocation: Randomized
Intervention Model: Crossover Assignment
Masking: None (Open Label)


Arms and Interventions

| Participant Group/Arm | Intervention/Treatment |
| --- | --- |
| Active Comparator: A1: Individual formulation of chlorthalidone<br>(Higroton 50, product of Sandoz, S.A. de C.V.) | Drug: Chlorthalidone (HIGROTON® 50)<br>* Tablets with 50mg of Chlorthalidone, product de Sandoz, S.A. de C.V.<br>* Other names: Chlo;|
| Active Comparator: A2:Individual formulation Losartan<br>(COZAAR, product of Schering Plough, S.A. de C.V., S.A. de C.V.) | Drug: Losartan (COZZAR®)<br>* Losartan potassium 100 mg tablet, a product of Schering-Plough, S.A. C.V.<br>* Other names: Los;|
| Active Comparator: A3: Co-administration of individual formulations<br>Co-administration of individual formulations of chlorthalidone and losartan potassium | Drug: A1+ A2 Co-administration of Chlorthalidone and Losartan<br>* 50mg chlorthalidone + 100 mg losartan potassium<br>* Other names: Chlo + Los;|
| Experimental: B: Fixed combination of chlorthalidone and losartan potassium<br>B: Fixed combination of chlorthalidone and losartan potassium (product of Laboratorios Silanes S.A. de C.V.) | Drug: Chlorthalidone + Losartan Fixed-Dose combination<br>* Tablets with fixed combination of Chlorthalidone 25 mg and Losartan Potassium<br>* Other names: FDC;|

What is the study measuring?
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Primary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| 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). | 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. | 
| 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. | 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. | 
| 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). | 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. | 
| 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). | 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. | 
| 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. | 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 Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| 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. | 67 days | 

 Terms related to the study
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Keywords Provided by Centre Hospitalier Valida
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Chlorthalidone, Losartan, No-interaction, pharmacokinetics, Fixed-dose combination (FDC)