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RECRUITING
NCT07440069
PHASE4

Analgesic Efficacy and Obstetric Effects of Tramadol, Paracetamol and Placebo in Active Labor

Sponsor: Universidad Nacional Autonoma de Honduras

View on ClinicalTrials.gov

Summary

This randomized, double-blind, placebo-controlled trial aims to compare the analgesic efficacy and obstetric effects of tramadol (100 mg IV) versus paracetamol (1 g IV) versus placebo (saline solution) in nulliparous women during active labor. The primary outcome is duration of active labor (minutes). Secondary outcomes include duration of expulsive phase, type of delivery, need for oxytocin augmentation, maternal adverse events (nausea, vomiting, somnolence, hypotension), and neonatal outcomes (Apgar scores at 1 and 5 minutes, NICU admission). The study hypothesizes that tramadol significantly reduces active labor duration compared to paracetamol and placebo, without compromising maternal or neonatal safety. A total of 300 nulliparous women (100 per group) will be enrolled at Hospital Escuela, Tegucigalpa, Honduras.

Official title: Analgesic Efficacy and Obstetric Effects of Tramadol, Paracetamol and Placebo in Active Labor: A Randomized Double-Blind Controlled Trial

Key Details

Gender

FEMALE

Age Range

15 Years - 45 Years

Study Type

INTERVENTIONAL

Enrollment

300

Start Date

2026-02-15

Completion Date

2026-09-30

Last Updated

2026-02-27

Healthy Volunteers

Yes

Conditions

Interventions

DRUG

Tramadol Hydrochloride

Tramadol 100 mg administered as a single intravenous dose at the onset of active labor. Tramadol is an atypical opioid analgesic with serotonin and noradrenaline reuptake inhibition properties. The dose is within standard clinical ranges for obstetric analgesia. Administration is performed by trained medical personnel following institutional protocols. Participants are monitored for adverse effects including nausea, vomiting, somnolence, dizziness, and hypotension.

DRUG

Paracetamol (acetaminophen)

Paracetamol 1 g administered as a single intravenous slow infusion at the onset of active labor. Paracetamol is a central analgesic acting through COX-3 inhibition in the central nervous system. It is widely used during pregnancy and labor due to its favorable safety profile. Administration is performed by trained medical personnel following institutional protocols. Participants are monitored for adverse effects including nausea, vomiting, and allergic reactions (rare).

DRUG

Placebo (Saline Solution)

Placebo consisting of 10 mL 0.9% saline solution administered as a single intravenous dose at the onset of active labor. The appearance and administration procedure are identical to the active interventions to maintain blinding. No pharmacological active ingredients are present. Administration is performed by trained medical personnel following institutional protocols.

Locations (2)

Hospital Escuela

Tegucigalpa, Francisco Morazán Department, Honduras

Instituto Hondureño de Seguridad Social

Tegucigalpa, Francisco Morazán Department, Honduras