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The study was carried out in the Clinical Unit and Analytical Unit of the Department of Pharmacology and Toxicology of the Faculty of Medicine of the Universidad Autónoma de Nuevo León, with the aim of comparing the bioavailability (maximum concentration and area under the curve) of an oral formulation containing Pregabalin 150 mg/Tramadol 50 mg in combination with the two oral formulations Pregabalin 150 mg or Tramadol 50 mg administered as a single dose, in healthy subjects under fasting conditions.
The study design was crossover, 3 x 6 x 3, prospective and longitudinal, at a single dose of the combination Pregabalin 150 mg/Tramadol 50 mg administered orally versus each component administered individually, with three treatments, three periods, six sequences and one elimination period (wash out) of 7 days in 30 healthy subjects, under fasting conditions. The objective of the study was to characterize the pharmacokinetic parameters, maximum plasma concentration (Cmax), area under the curve (AUC), time to achieve Cmax (tmax), elimination constant (Ke), and elimination half life (t1/2) of Pregabalin and Tramadol after single oral dose administration, in combination: Pregabalin 150 mg/Tramadol 50 mg, tablets (Laboratorios Silanes S.A. de C.V.) versus each component individually managed, as well as to establish the frequency and type of events presented after the administration of a single dose of the formulations.
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| Label | Type | Description | Intervention Names |
|---|---|---|---|
| Group A: Pregabalin/ Tramadol Fixed dose | Experimental | Pharmaceutical Form: Tablet Dosage: 150 mg / 50 mg Administration way: oral |
|
| Group B: Pregabalin (Lyrica®) | Active Comparator | Pharmaceutical Form: Capsule Dosage: 150 mg Administration way: oral |
|
| Group C: Tramadol (Tradol®) | Active Comparator | Pharmaceutical Form: Tablet Dosage: 50 mg Administration way: oral |
|
| Name | Type | Description | Arm Group Labels | Other Names |
|---|---|---|---|---|
| Fixed dose combination Pregabalin 150 mg / Tramadol 50 mg | Drug | Pregabalin/Tramadol (Laboratorios Silanes S.A. de C.V.), Pharmaceutical Form: Tablet Dosage: 150 mg / 50 mg Administration way: oral |
| Measure | Description | Time Frame |
|---|---|---|
| Maximum observed concentration following the treatment (Cmax) | Evaluate the pharmacokinetics profile of the fixed dose Pregabalin/Tramadol, employing the maximum observed concentration following the treatment (Cmax), obtained graphically, from the plasma concentration profile with respect to time. | Baseline, 0.16, 0.33, 0.50, 1.00, 1.50, 2.0, 2.5, 3.0, 3.5, 4.0, 6.0, 10.0, 14.0, 24.0 and 36.0 hours. |
| The area under the curve from time zero to the last measurable concentration (AUC 0-t) | Evaluate the fixed dose pharmacokinetics profile of Pregabalin/Tramadol, employing the area under the curve from time zero to the last measurable concentration (AUC 0-t) using the linear trapezoidal method. | Baseline, 0.16, 0.33, 0.50, 1.00, 1.50, 2.0, 2.5, 3.0, 3.5, 4.0, 6.0, 10.0, 14.0, 24.0 and 36.0 hours. |
| The area under the curve from time zero to infinity calculated (AUC 0-inf) | Evaluate the fixed dose pharmacokinetics profile of Pregabalin/Tramadol, employing the area under the curve from time zero to infinity calculated (AUC 0-inf). | Baseline, 0.16, 0.33, 0.50, 1.00, 1.50, 2.0, 2.5, 3.0, 3.5, 4.0, 6.0, 10.0, 14.0, 24.0 and 36.0 hours. |
| Time of the maximum measured concentration (Tmax) | Evaluate the fixed dose pharmacokinetics profile of Pregabalin/Tramadol, employing time of the maximum measured concentration (tmax), Obtained graphically, from the plasma concentration profile with respect to time. | Baseline, 0.16, 0.33, 0.50, 1.00, 1.50, 2.0, 2.5, 3.0, 3.5, 4.0, 6.0, 10.0, 14.0, 24.0 and 36.0 hours. |
| Elimination rate (Ke) | Evaluate the fixed dose pharmacokinetics profile of Pregabalin/Tramadol, employing the elimination rate (Ke), estimated from the terminal linear portion of the plasma concentration profile with respect to time (on a semi-log scale) |
| Measure | Description | Time Frame |
|---|---|---|
| Frequency of occurrence of adverse events | The percentage of frequency of appearance of each adverse event was evaluated. | 6 and 19 days |
| Adverse events | Any adverse event were classified by severity, treatment and its relationship with the study drug was evaluated. |
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Inclusion Criteria:
Exclusion Criteria:
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| Name | Affiliation | Role |
|---|---|---|
| Lourdes Garza Ocaña, M.D | Department of Pharmacology and Toxicology of the Faculty of Medicine of the U.A.N.L | Principal Investigator |
| Facility | Status | City | State | ZIP | Country | Contacts |
|---|---|---|---|---|---|---|
| Laboratorio Silanes, S.A. de C.V. | Mexico City | Mexico City | 11000 | Mexico |
| PubMed Identifier | Type | Citation | Retractions |
|---|---|---|---|
| 19062215 | Background | Patel BN, Sharma N, Sanyal M, Shrivastav PS. An accurate, rapid and sensitive determination of tramadol and its active metabolite O-desmethyltramadol in human plasma by LC-MS/MS. J Pharm Biomed Anal. 2009 Feb 20;49(2):354-66. doi: 10.1016/j.jpba.2008.10.030. Epub 2008 Nov 5. | |
| 25939332 | Background | Filipe A, Almeida S, Pedroso PF, Neves R, Marques S, Sicard E, Massicotte J, Ortuno J. Single-Dose, Randomized, Open-Label, Two-Way, Crossover Bioequivalence Study of Two Formulations of Pregabalin 300 mg Hard Capsules in Healthy Volunteers Under Fasting Conditions. Drugs R D. 2015 Jun;15(2):195-201. doi: 10.1007/s40268-015-0094-8. |
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|
| Pregabalin 150mg | Drug | From Pfizer S.a. de C.V. Pharmaceutical Form: Capsule Dosage: 150 mg Administration way: oral |
|
|
| Tramadol 50 mg | Drug | From Grünenthal de México, S.A. de C.V. Pharmaceutical Form: Capsule Dosage: 50 mg Administration way: oral |
|
|
| Baseline, 0.16, 0.33, 0.50, 1.00, 1.50, 2.0, 2.5, 3.0, 3.5, 4.0, 6.0, 10.0, 14.0, 24.0 and 36.0 hours. |
| Half time elimination (t1/2) | Evaluate the pharmacokinetics profile of the fixed dose Pregabalina/Tramadol, employing the half time elimination (t1/2) by the quotient of Ln(2)Ke. | Baseline, 0.16, 0.33, 0.50, 1.00, 1.50, 2.0, 2.5, 3.0, 3.5, 4.0, 6.0, 10.0, 14.0, 24.0 and 36.0 hours. |
| 6 and 19 days |
| 25750519 | Background | Zhou X, Liu J. Fluorescence detection of tramadol in healthy Chinese volunteers by high-performance liquid chromatography and bioequivalence assessment. Drug Des Devel Ther. 2015 Feb 26;9:1225-31. doi: 10.2147/DDDT.S73723. eCollection 2015. |
| 15315511 | Background | Ben-Menachem E. Pregabalin pharmacology and its relevance to clinical practice. Epilepsia. 2004;45 Suppl 6:13-8. doi: 10.1111/j.0013-9580.2004.455003.x. |
| 16234874 | Background | Zareba G. Pregabalin: a new agent for the treatment of neuropathic pain. Drugs Today (Barc). 2005 Aug;41(8):509-16. doi: 10.1358/dot.2005.41.8.910482. |
| 20435245 | Background | Silva Mde F, Schramm SG, Kano EK, Mori Koono EE, Porta V, dos Reis Serra CH. Bioequivalence evaluation of single doses of two tramadol formulations: a randomized, open-label, two-period crossover study in healthy Brazilian volunteers. Clin Ther. 2010 Apr;32(4):758-65. doi: 10.1016/j.clinthera.2010.03.016. |
| 20166437 | Background | Liu P, Liang S, Wang BJ, Guo RC. Development and validation of a sensitive LC-MS method for the determination of tramadol in human plasma and urine. Eur J Drug Metab Pharmacokinet. 2009 Jul-Sep;34(3-4):185-92. doi: 10.1007/BF03191172. |
| ID | Term |
|---|---|
| D059787 | Acute Pain |
| ID | Term |
|---|---|
| D010146 | Pain |
| D009461 | Neurologic Manifestations |
| D012816 | Signs and Symptoms |
| D013568 | Pathological Conditions, Signs and Symptoms |
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| ID | Term |
|---|---|
| D014147 | Tramadol |
| D000069583 | Pregabalin |
| ID | Term |
|---|---|
| D003511 | Cyclohexanols |
| D000441 | Hexanols |
| D005233 | Fatty Alcohols |
| D000438 | Alcohols |
| D009930 | Organic Chemicals |
| D004123 | Dimethylamines |
| D008744 | Methylamines |
| D000588 | Amines |
| D008055 | Lipids |
| D005680 | gamma-Aminobutyric Acid |
| D000613 | Aminobutyrates |
| D002087 | Butyrates |
| D000144 | Acids, Acyclic |
| D002264 | Carboxylic Acids |
| D000596 | Amino Acids |
| D000602 | Amino Acids, Peptides, and Proteins |
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