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Tapentadol vs Pregabalin for Postoperative Pain in Lower Limb Surgery
Oral Premedication With Tapentadol Versus Pregabalin for Acute Postoperative Pain in Lower Limb Surgery Under Neuraxial Anesthesia: A Pilot Randomized Controlled Trial
Visão geral do estudo
Status
Intervenção / Tratamento
Descrição detalhada
Acute postoperative pain affects over 80% of surgical patients, with orthopaedic lower limb procedures causing particularly severe pain. Preemptive analgesia may attenuate central sensitisation before surgical incision. Tapentadol (μ-opioid agonist + norepinephrine reuptake inhibitor) and pregabalin (voltage-gated calcium channel modulator) are pharmacologically distinct options, but direct comparative data are lacking.
This single-centre, double-blind, parallel-group pilot randomised controlled trial was conducted at Hospital Regional "General Ignacio Zaragoza," ISSSTE, Mexico City. Forty-six patients (ASA I-II, age 18-50 years, BMI 18-35 kg/m²) scheduled for elective lower limb surgery under neuraxial anaesthesia were randomised 1:1 to receive either tapentadol 50 mg orally every 12 hours (n=23) or pregabalin 75 mg orally every 24 hours (n=23), both initiated 72 hours before surgical incision.
The primary outcome was postoperative pain intensity assessed using the Numeric Rating Scale (NRS 0-10) at PACU arrival (T0) and at 30 (T1), 60 (T2), 90 (T3), and 120 (T4) minutes thereafter. Secondary outcomes included Verbal Rating Scale (VRS) scores, rescue morphine consumption (4 mg IV on request), and incidence of nausea/vomiting and hypersensitivity reactions. The primary longitudinal analysis used a linear mixed model with Group, Time, and Group×Time interaction as fixed effects and a random intercept per patient. Between-group contrasts at each timepoint were derived from estimated marginal means with Holm correction. Effect sizes are reported as Cohen's d.
The trial was approved by the institutional ethics and research committee (RPI #386-2024) and registered with the ISSSTE institutional research registry prior to enrolment. Due to institutional policy restrictions at the time of study initiation, registration on ClinicalTrials.gov was completed after data collection; this is disclosed transparently in accordance with CONSORT 2025 guidance on retrospective registration disclosure.
Tipo de estudo
Inscrição (Real)
Estágio
- Não aplicável
Contactos e Locais
Locais de estudo
-
-
Mexico City
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Mexico City, Mexico City, México, 09360
- Hospital Regional "General Ignacio Zaragoza," ISSSTE
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-
Critérios de participação
Critérios de elegibilidade
Idades elegíveis para estudo
- Adulto
Aceita Voluntários Saudáveis
Descrição
Inclusion Criteria:
- Age 18-50 years
- ASA physical status I or II
- Body mass index between 18 and 35 kg/m²
- Scheduled for elective lower limb surgery under neuraxial anaesthesia
- Willing to provide written informed consent
Exclusion Criteria:
- Chronic use of analgesics or gabapentinoids
- Known hypersensitivity to tapentadol or pregabalin
- Pre-existing chronic pain
Elimination Criteria:
- Hypersensitivity reaction to any study drug during administration
- Hemodynamic shock of any etiology
- Requirement for advanced airway management or postoperative mechanical ventilation
- Surgical duration exceeding 120 minutes
- Requirement of an epidural catheter dose within the first two postoperative hours
- Voluntary withdrawal of consent at any point
Plano de estudo
Como o estudo é projetado?
Detalhes do projeto
- Finalidade Principal: Prevenção
- Alocação: Randomizado
- Modelo Intervencional: Atribuição Paralela
- Mascaramento: Quadruplicar
Armas e Intervenções
Grupo de Participantes / Braço |
Intervenção / Tratamento |
|---|---|
|
Experimental: Tapentadol
Oral tapentadol 50 mg every 12 hours for 72 hours before surgical incision (total daily dose 100 mg).
|
Tapentadol 50 mg immediate-release oral tablet administered every 12 hours for 72 hours preoperatively (total of 6 doses).
|
|
Comparador Ativo: Pregabalin
Oral pregabalin 75 mg every 24 hours for 72 hours before surgical incision (total daily dose 75 mg).
|
Pregabalin 75 mg oral capsule administered every 24 hours for 72 hours preoperatively (total of 3 doses).
|
O que o estudo está medindo?
Medidas de resultados primários
Medida de resultado |
Descrição da medida |
Prazo |
|---|---|---|
|
Pain intensity by Numeric Rating Scale (NRS)
Prazo: At PACU arrival (T0), 30 minutes (T1), 60 minutes (T2), 90 minutes (T3), and 120 minutes (T4) post-arrival
|
Postoperative pain intensity measured using the Numeric Rating Scale (NRS, 0-10; 0 = no pain, 10 = worst imaginable pain).
The primary longitudinal analysis used a linear mixed model with Group, Time, and Group×Time interaction as fixed effects and a random intercept per patient.
Between-group contrasts at each timepoint were derived from estimated marginal means with Holm correction.
Effect sizes reported as Cohen's d.
|
At PACU arrival (T0), 30 minutes (T1), 60 minutes (T2), 90 minutes (T3), and 120 minutes (T4) post-arrival
|
Medidas de resultados secundários
Medida de resultado |
Descrição da medida |
Prazo |
|---|---|---|
|
Rescue morphine consumption
Prazo: During the two-hour PACU observation period (T0-T4)
|
Proportion of patients requiring rescue analgesia (morphine 4 mg IV) and total morphine consumption (mg) in each group.
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During the two-hour PACU observation period (T0-T4)
|
|
Incidence of nausea and vomiting
Prazo: During the two-hour PACU observation period (T0-T4)
|
Proportion of patients experiencing nausea and/or vomiting in each group, assessed by clinical observation and patient report.
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During the two-hour PACU observation period (T0-T4)
|
|
Hypersensitivity reactions
Prazo: From first dose of study medication through 24 hours post-surgery
|
Incidence of any hypersensitivity or anaphylactic reaction to tapentadol or pregabalin, classified according to Müller criteria.
|
From first dose of study medication through 24 hours post-surgery
|
|
Verbal Rating Scale (VRS) pain category
Prazo: At PACU arrival (T0), 30 minutes (T1), 60 minutes (T2), 90 minutes (T3), and 120 minutes (T4) post-arrival
|
Pain severity categorised as absence, low, moderate, or severe using the Verbal Rating Scale (VRS).
Reported as proportions of patients in each category at each timepoint.
|
At PACU arrival (T0), 30 minutes (T1), 60 minutes (T2), 90 minutes (T3), and 120 minutes (T4) post-arrival
|
Colaboradores e Investigadores
Patrocinador
Datas de registro do estudo
Datas Principais do Estudo
Início do estudo (Real)
Conclusão Primária (Real)
Conclusão do estudo (Real)
Datas de inscrição no estudo
Enviado pela primeira vez
Enviado pela primeira vez que atendeu aos critérios de CQ
Primeira postagem (Real)
Atualizações de registro de estudo
Última Atualização Postada (Real)
Última atualização enviada que atendeu aos critérios de controle de qualidade
Última verificação
Mais Informações
Termos relacionados a este estudo
Palavras-chave
Termos MeSH relevantes adicionais
- Dor
- Manifestações Neurológicas
- Complicações pós-operatórias
- Processos Patológicos
- Condições Patológicas, Sinais e Sintomas
- Sinais e sintomas
- Dor, Pós-operatório
- Aminoácidos, peptídeos e proteínas
- Produtos químicos orgânicos
- Hidrocarbonetos
- Hidrocarbonetos, cíclicos
- Ácidos, acíclico
- Ácidos carboxílicos
- Hidrocarbonetos, aromáticos
- Aminoácidos
- Fenóis
- Derivados de benzeno
- Ácido gama-aminobutírico
- Aminobutiratos
- Butyrates
- Pregabalina
- Tapentadol
Outros números de identificação do estudo
- ISSSTE RPI #386-2024
Plano para dados de participantes individuais (IPD)
Planeja compartilhar dados de participantes individuais (IPD)?
Descrição do plano IPD
Prazo de Compartilhamento de IPD
Critérios de acesso de compartilhamento IPD
Tipo de informação de suporte de compartilhamento de IPD
- PROTOCOLO DE ESTUDO
- ANALYTIC_CODE
- CSR
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