CClinicalTrials.gg
CompletedNCT03564665Updated Apr 12, 2021

Investigating Magnesium Glycinate in Structure/Function Role of Hot Flashes.

An interventional study of 400mg Magnesium Glycinate BID and Placebo in Hot Flashes, sponsored by Mayo Clinic. Completed at 1 site in United States. Open to female participants aged 25 Years to 85 Years. Per ClinicalTrials.gov, last updated 2021-04-12.

Sponsored by Mayo Clinic · Not applicable, Interventional, and Treatment

Phase
Not applicable
Study type
Interventional
Enrollment
40
Allocation
Randomized
Ages
25 Years to 85 Years
Sex
Female
01

Study summary

The goal of this study is to further evaluate the effect of magnesium on the symptoms of menopause, specifically vasomotor symptoms (VMS) in breast cancer patients and/or women at an elevated risk of breast cancer.

Read the detailed description

Hot flashes are one of the most common symptoms that are experienced in women during perimenopause, menopause, and as a result of treatment of cancer such as breast cancer. Hot flashes, also known as vasomotor symptoms (VMS) may decrease a woman's quality of life due to discomfort, disruption of daily life, interruption of sleep, and worsening of depression. Previously, estrogen-based therapy was the primary treatment choice for VMS. However, in recent years, this has been considered less favorable due to the increased risk of breast cancer associated with estrogen-based therapy.

While medications such as certain antidepressants, gabapentin and clonidine are available as non-hormonal treatment options, they appear to be less effective in comparison to estrogen therapy with reported adverse effects.

Magnesium supplementation has been found to have very promising results in alleviating VMS in patients with a history of breast cancer. The goal of this study is to further investigate the effects of administering magnesium supplementation in reducing the effects of hot flashes in this targeted population. Our aim is to create a controlled trial using different dosages of magnesium glycinate in the management of hot flashes. Participants will be asked to complete surveys for data collection and analysis.

02

Conditions studied

  • Hot Flashes

Browse trials for

03

In context

Hot Flashes

285 studies on the registry are indexed under Hot Flashes; 50 are open to participants now.

This study's enrollment of 40 is below the median of 90 across 255 interventional studies indexed under Hot Flashes.

Browse Hot Flashes studies →

Lead sponsor

Mayo Clinic is the lead sponsor of 3,218 studies on the registry; 670 are open to participants now.

Of its 445 completed or terminated interventional studies of FDA-regulated products, 313 (70%) have results posted.

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

04

Who can participate

Ages eligible
25 Years to 85 Years
Sexes eligible
Female
Accepts healthy volunteers
No

Inclusion criteria

  • Age: 25-85 years.
  • Women with a history of invasive breast cancer, DCIS, or LCIS
  • Creatine labs drawn within 90 days as part of Standard of Care.
  • Bothersome hot flashes (defined by their occurrence of two or more hot flashes a day and/or of sufficient severity to prompt the patient to seek therapeutic intervention).
  • Presence of hot flashes for >30 days prior to study entry.
  • Ability to complete questionnaire(s) by themselves or with assistance.
  • Ability to provide informed written consent.
  • Life expectancy ≥6 months.
  • Willing to work with the enrolling institution for follow-up (during the Active Monitoring Phase of the study).
  • ECOG Performance Status (PS) = 0, 1.

Exclusion criteria

Exclusion Criteria:

  • Pregnancy (Assessed on Intake Questionnaire. Positive Answer exclusionary)
  • Any of the following current (≤4 weeks prior) or planned therapies:
  • Antineoplastic chemotherapy (anti-HER2 agents allowed)
  • Androgens
  • Estrogens (any delivery route)
  • Progestogens
  • Tamoxifen, raloxifene and aromatase inhibitors are allowed, but patient must have been on a constant dose for at least 28 days and must not be expected to stop the medication during the study period
  • SSRIs/SNRIs
  • Gabapentin
  • Clonidine
  • Oxybutinin
  • Stage IV or V renal disease or GFR\<30 in the last 90 days
05

Study design

Phase
Not applicable
Primary purpose
Treatment
Allocation
Randomized
Intervention model
Parallel assignment
Masking
Single (Participant)
Enrollment
40 participants (actual)

Study arms

  • Experimental
    400mg Magnesium Glycinate BID Arm

    Prescription for an 8 week supply (+/- 4 days) of Magnesium Glycinate will be sent to the pharmacy for patient pick up. Study Coordinator will then dispense study diaries (Supplementation Diary and Hot Flash Diary) with instructions on how to complete for the eight week study duration. Study Coordinator will discuss upcoming phone calls on Weeks 2-8 to complete the MDASI by phone and the best times to do so with the patient. Coordinator will schedule a return visit with the Patient approximately 9 weeks after the start of the study for follow-up. At follow-up, Coordinator will retrieve Patient Diaries (Hot Flash Diary and Medication Diary), perform supplement reconciliation, and exit Patient from the study.

    Dietary Supplement: 400mg Magnesium Glycinate BID

  • Placebo comparator
    Control Arm

    Prescription for an 8 week supply (+/- 4 days) of placebo will be sent to the pharmacy for patient pick up. Study Coordinator will then dispense study diaries (Supplementation Diary and Hot Flash Diary) with instructions on how to complete for the eight week study duration. Study Coordinator will discuss upcoming phone calls on Weeks 2-8 to complete the MDASI by phone and the best times to do so with the patient. Coordinator will schedule a return visit with the Patient approximately 9 weeks after the start of the study for follow-up. At follow-up, Coordinator will retrieve Patient Diaries (Hot Flash Diary and Medication Diary), perform supplement reconciliation, and exit Patient from the study.

    Other: Placebo

Interventions

  • Dietary supplement400mg Magnesium Glycinate BID

    400mg Magnesium Glycinate BID for 8 weeks.

  • OtherPlacebo

    Placebo BID for 8 weeks.

06

What researchers measure

Primary outcomes

  1. Percent change in hot flash frequency

    The primary endpoint of this study will be the percent change in hot flash frequency from baseline to week 8. A two independent sample z-test (assuming equal variances) or a Wilcoxon rank-sum test will be used for the analysis of this endpoint.

    Time frame: 8 weeks.

Secondary outcomes

  1. Average change in hot flash frequency from baseline to week 8

    The secondary analysis, we will also look at the average change in hot flash frequency from baseline to week 8 and compare these means using a two-sample t-test or a Wilcoxon rank-sum test. Adverse events (as captured using the NCI CTCAE version 4) will be compared between the two investigational arms using summary statistics. Frequencies of adverse events will be compared using chi-square tests or Fisher's exact tests. Change in QOL (as measured by the MDASI) from baseline to week 8 will be compared for each question between the investigational arms using two sample t-tests or Wilcoxon rank sum tests.

    Time frame: 8 weeks

07

Study locations

1 site
  • Mayo Clinic in Florida
    Jacksonville, Florida 32224, United States
08

References and documents

Study documents

  • Study protocol · Apr 10, 2018

Documents are hosted by the registry — open the source record to download them.

Individual participant data

Plan to share: No

09

Updates

Tracking since Sep 25, 2026
No changes since tracking began. The registry record was last updated on Apr 12, 2021, before this site started recording changes on Sep 25, 2026. Its history is on ClinicalTrials.gov ↗
10

Registry details

Key details

Study ID
NCT03564665
Lead sponsor
Mayo Clinic
Responsible party
Dawn M. Mussallem, D.O. (Dawn M. Mussallem, D.O., Mayo Clinic) — Principal investigator
First posted
Jun 21, 2018
Start date
Jul 24, 2018
Primary completion
Apr 10, 2021
Completion
Apr 10, 2021
Last update
Apr 12, 2021

Study contacts

Dawn M Mussallem
principal investigator · Mayo Clinic

Oversight

Data monitoring committee
No
FDA-regulated drug
No
FDA-regulated device
No
View the source record on ClinicalTrials.gov ↗

Not currently enrolling

This study is completed, as verified in Apr 2021. 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