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NCT Number: NCT07789600

Trial Evaluating the Analgesic Efficacy of Magnesium Sulfate as an Adjuvant to Bupivacaine in Local Wound Infiltration for Patients Undergoing Modified Radical Mastectomy (MRM) With Axillary Clearance

This is a double-blind, randomized, controlled clinical trial evaluating the analgesic efficacy and safety of magnesium sulfate as an adjuvant to bupivacaine for local wound infiltration in patients undergoing modified radical mastectomy with axillary clearance. Participants will be randomized to receive either magnesium sulfate 750 mg with bupivacaine or the control intervention. Postoperative pain, analgesic requirements, and safety outcomes will be assessed during the postoperative period, including a follow-up safety assessment between Day 7 and Day 14 after surgery.

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Key information

Conditions

Modified Radical Mastectomy

Age range

18 year and older

Sex eligibility

All sexes

Study type

Interventional

Phase

Not applicable

Primary location

Who can participate

Healthy volunteers accepted: No

Only the study team can determine whether someone qualifies for participation.

Inclusion criteria

  • Adult female patients (age ≥18 years) undergoing elective modified radical mastectomy (MRM) with axillary clearance.
  • ASA physical status I-III.
  • Willingness to participate and provide informed consent.

Exclusion criteria

  • Allergy to bupivacaine or magnesium.
  • Chronic opioid use or pre-existing chronic pain conditions.
  • Significant renal or hepatic impairment.
  • Pregnancy or lactation.
  • Neuromuscular disorders.
  • Abnormal baseline serum magnesium levels (e.g., hypermagnesemia).

Treatment and study plan

Magnesium Sulfate 750 mg with Bupivacaine 0.5% for Local Wound Infiltration

Drug

Magnesium sulfate 750 mg added to 0.5% bupivacaine for a single intraoperative local wound infiltration following modified radical mastectomy with axillary clearance.

Bupivacaine 0.5% + Normal Saline

Drug

A single intraoperative local wound infiltration of 0.5% bupivacaine combined with normal saline following modified radical mastectomy with axillary clearance. The planned bupivacaine dose is 100 mg (20 mL), subject to reduction if it exceeds the participant-specific maximum allowable dose based on body weight.

Primary outcomes

  1. Overall Postoperative Pain Burden During the First 24 Hours After Surgery

    Time frame: From the end of surgery through 24 hours postoperatively.

    Area under the curve (AUC) of Visual Analogue Scale (VAS) pain scores at rest during the first 24 hours after surgery. The Visual Analogue Scale (VAS) ranges from 0 to 10, where 0 indicates no pain and 10 indicates the worst imaginable pain; higher scores indicate worse pain.

Study contacts

Contact information is provided by the study sponsor or research team.

Clinical Research Coordinator

CONTACT

[email protected]

+962 788390734

Supervisor, Clinical Trials Unit

CONTACT

[email protected]

+962 6 5300460 ext. 1342

Sponsors and collaborators

Lead sponsor

King Hussein Cancer Center

Other

Registry information

Official study title

A Double-Blind, Randomized Controlled Trial Evaluating the Analgesic Efficacy of Magnesium Sulfate as an Adjuvant to Bupivacaine in Local Wound Infiltration for Patients Undergoing Modified Radical Mastectomy (MRM) With Axillary Clearance

Important dates

Study start
2026
Primary completion
2027
Study completion
2028
First posted
Aug 27, 2026
Registry last updated
Aug 31, 2026

OpenTrials presents study information sourced from ClinicalTrials.gov. The official registry record should be consulted for the latest information.

View the official ClinicalTrials.gov record (opens in a new tab)

This listing is for discovery and informational purposes only. It is not medical advice, does not guarantee that a study is recruiting, and does not determine eligibility. Contact the study team and a qualified healthcare professional when considering participation.

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