CClinicalTrials.gg
CompletedNCT00423540Updated Dec 10, 2008

Exploring the Role of Magnesium in Rest Cramps

An interventional study of Intravenous Infusion of Magnesium Sulfate in Rest Cramps, sponsored by University of British Columbia. Completed at 1 site in Canada. Open to participants aged 19 Years and older, including healthy volunteers. Per ClinicalTrials.gov, last updated 2008-12-10.

Sponsored by University of British Columbia · Not applicable, Interventional, and Treatment

Phase
Not applicable
Study type
Interventional
Enrollment
54
Allocation
Randomized
Ages
19 Years and older
Sex
All
01

Study summary

This study sets out to show whether infusions of magnesium can lessen the frequency of rest cramps and to determine whether rest cramp sufferers have a deficiency in magnesium.

Read the detailed description

Subjects will be randomized to receive 5 days of 4 hour IV infusions of D5W either with or without 20 mmol magnesium sulfate added. Twenty four hour urinary excretion of magnesium will be determined on the first day of infusions to assess whether magnesium deficiency is present. Ten normal controls will also undergo a single infusion and collection of urine to serve as a comparison group for the urinary excretion data.

02

Conditions studied

  • Rest Cramps

Browse trials for

Keywords

  • magnesium infusion
  • magnesium sulfate
  • rest cramps
  • nocturnal leg cramps
  • muscle cramps
  • fractional urinary excretion
  • urinary excretion
  • 24 hour urine
  • serum magnesium
  • magnesium deficiency
  • family practice
  • general practice
  • richmond
  • cramp frequency
  • magnesium status
  • urinary magnesium
  • cramp diary
  • sf 36
03

In context

Muscle Cramp

95 studies on the registry are indexed under Muscle Cramp; 9 are open to participants now.

This study's planned enrollment of 54 is close to the median of 50 across 85 interventional studies indexed under Muscle Cramp.

Browse Muscle Cramp studies →

Lead sponsor

University of British Columbia is the lead sponsor of 1,309 studies on the registry; 253 are open to participants now.

Of its 6 completed or terminated interventional studies of FDA-regulated products, 1 (17%) have results posted.

Counted across the registry records on this site, refreshed daily.

04

Who can participate

Ages eligible
19 Years and older
Sexes eligible
All
Accepts healthy volunteers
Yes

Inclusion criteria

  • ≥2 leg or foot cramps per week in a 4 week run-in diary

Exclusion criteria

Exclusion Criteria:

  • eGFR\<50
  • Neurologic disease
  • Pregnancy
  • Heart block
  • Bradyarhythmia without pacemaker
  • Digoxin use
  • Liver disease
  • Addison's disease
  • History of MI
  • CHF
  • Absence of detectable reflexes
05

Study design

Phase
Not applicable
Primary purpose
Treatment
Allocation
Randomized
Intervention model
Parallel assignment
Masking
Double (Participant, Investigator)
Enrollment
54 participants (estimated)

Interventions

  • DrugIntravenous Infusion of Magnesium Sulfate

    See Detailed Description.

06

What researchers measure

Primary outcomes

  1. Change in the frequency of leg cramps per week (active versus placebo) over the first 30 days post infusions compared to the 30 days prior to randomization (as recorded in patient diaries).

    Time frame: See above

Secondary outcomes

  1. Assessment of magnesium status at trial entry as determined by 24 hour fractional excretion of magnesium on day 1 of infusions.

  2. Subjective assessment as to whether cramps were unchanged, more, or less frequent /painful/"bothersome" over the 3 months. following infusions.

    Time frame: See above

  3. Overall quality of life changes as measured by an SF36 questionnaire.

07

Study locations

1 site
  • Richmond Hospital
    Richmond, British Columbia V7C 4W7, Canada
08

Updates

Tracking since Sep 25, 2026
No changes since tracking began. The registry record was last updated on Dec 10, 2008, before this site started recording changes on Sep 25, 2026. Its history is on ClinicalTrials.gov ↗
09

Registry details

Key details

Study ID
NCT00423540
Lead sponsor
University of British Columbia
Collaborators
Vancouver Coastal Health Research Institute
First posted
Jan 18, 2007
Start date
Jan 2007
Primary completion
Nov 2008
Completion
Nov 2008
Last update
Dec 10, 2008

Study contacts

Garrison Scott, MD
principal investigator · University of British Columbia

Oversight

Data monitoring committee
No
View the source record on ClinicalTrials.gov ↗

Not currently enrolling

This study is completed, as verified in Dec 2008. You cannot join it, but the record below documents what was studied.

Follow this study

Get an email when the registry record changes — status, dates, results — or when someone posts here.

Sign in to follow

Discussion

Questions and observations about this study, from anyone following it. Not medical advice, and not a channel to the study team — their contact details are on the registry record.

Sign in to join the discussion. Reading takes no account; posting does. You choose a display name, and a pseudonym is the default.

Nothing here yet. If you are running this trial, taking part in it, or weighing whether to, this is the place to say so.

Start the discussion