Trial | NCT04595877  Report issue

Title

Double-blind, Randomized Controlled Study to Assess the Analgesic Effect of 2 g of Magnesium Dipyrone (Metamizol) and Changes in Plasma Beta-endorphin Immunoreactivity Values in Patients Undergoing Elective Inguinal Herniorrhaphy Under Epidural Anesthesia.
Double-blind, Randomized Controlled Study to Assess the Analgesic Effect of a Single Intravenous Dose of 2 g of Magnesium Dipyrone (Metamizol) and Changes in Plasma Beta-endorphin Immunoreactivity (Beta-EPIr) Values in Patients Undergoing Elective Inguinal Herniorrhaphy (Bassini Operation) Under Epidural Anesthesia.

  • Phase

    Phase 4

  • Study Type

    Interventional

  • Status

    Completed No Results Posted

  • Intervention/Treatment

    Dipyrone administration ...

  • Study Participants

    60
A double-blind, randomized controlled study is designed to assess the analgesic effect of a single intravenous dose of 2 g of magnesium dipyrone (metamizol) and whether the administration of the active drug will be associated with changes in plasma beta-endorphin immunoreactivity values in patients undergoing elective inguinal herniorrhaphy (Bassini operation) under epidural anesthesia. Participants, care givers, and those assessing the outcomes will be blinded to group assignment. Participants will be randomized to receive dipyrone or a placebo. The active drug or placebo will be administered as an intravenous infusion over 10 min. Pain will be evaluated by the patient according to a 100-mm visual analogue scale. Assessments will be carried out the day before surgery, immediately after operation, at the time of drug administration, and 60 and 180 min after treatment. At the same time as pain will be evaluated, blood samples will be drawn for plasma beta-endorphin immunoreactivity measurement (immunoradiometric assay).
Study Started
Jan 31
2006
Primary Completion
May 31
2006
Study Completion
May 31
2006
Last Update
Oct 22
2020

Drug Dipyrone administration

Dipyrone 2 g (Nolotil®, Europharma, Madrid, Spain); one ampoule in 50 mL of 0.9% saline solution as an intravenous infusion over 10 min.

Behavioral Pain assessment

Pain will be evaluated by the patient according to a 100-mm visual analogue scale (VAS) (from point 0 "no pain" to point 10 "unbearable pain").

Biological beta-endorphin immunoreactivity

Plasma beta-EPIr levels will be measured by an immunoradiometric assay (Allegro Beta-endorphin, Nichols Institute Diagnostics, SAN JUAN DE CAPISTRANO, CA) (normal values 29-40 pg/mL). It will be obtained by venous blood samples (5 mL) at the same time points at pain will be measured.

Other Placebo administration

Placebo in 50 mL of 0.9% saline solution as an intravenous infusion over 10 min.

Dipyrone group Experimental

Dipyrone 2 g (Nolotil®, Europharma, Madrid, Spain); one ampoule in 50 mL of 0.9% saline solution as an intravenous infusion over 10 min.

Placebo group Placebo Comparator

The placebo will be matched to the study drug for, color, and size. Placebo will be administered in a single dose in 50 mL of 0.9% saline solution as an intravenous infusion over 10 min.

Criteria 

Inclusion Criteria:

18-70 years, elective surgery, routine laboratory tests (blood cell count, biochemical profile, urinalysis), chest radiography, twelve-lead electrocardiography, body mass index (BMI), blood pressure, pulse rate normal or abnormal values without clinical relevance and a mental status sufficient to be able to complete efficacy tests.

Exclusion Criteria:

Patients who had taken other analgesics or anti-inflammatory drugs 24 h before surgery, as those with known hypersensitivity to the drug or with any other disorder contradicting the administration of dipyrone. Patients with hypersensitivity to non-steroidal anti-inflammatory agents.
No Results Posted