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Can a nasal spray boost memory? small study tests insulin

NCT ID NCT04199767

Symptom relief Sponsor: Wake Forest University Health Sciences Source: ClinicalTrials.gov ↗

What the study statuses mean

This study's is highlighted.

Recruitment status, easiest to join first

Recruiting now
This trial is taking on new participants right now.
Not yet recruiting
Registered, but not yet taking participants.
By invitation only
Not open to general applications. Only people the study team invites can take part.
Paused
Paused for now. It may or may not start again.
Ongoing
Running, but no longer taking on new participants.
Completed This study
The trial has finished. Results may not be published yet.
Stopped early
Stopped early, before it reached the end. That can be for many reasons, including safety.
Cancelled
Cancelled before anyone took part.

Expanded access (not trials)

Expanded access
Not a trial. This treatment can be requested outside a study, case by case, for people who qualify.
Expanded access (paused)
Not a trial. The treatment can normally be requested outside a study, but is unavailable right now.
Expanded access (ended)
Not a trial. The treatment could once be requested outside a study, but no longer can.
Approved
The treatment has been approved, so it is available normally rather than through this programme.

When the status isn't known

Details not published
The full record has not been published yet, so there is little to show here.
Status unknown
This status has not been confirmed recently, so it may be out of date.

First seen Jun 27, 2026 · Last updated Jun 27, 2026

Summary

This study tested whether giving insulin through the nose can help people with mild memory problems. Thirteen participants received either 20 or 40 units of insulin via a nasal device. Researchers measured how much insulin reached the fluid around the brain and checked memory with a word recall test.

What this could mean

Our plain-language read of the trial. This is informational only, not medical advice or a prediction.

Active substance
insulin (Humulin R U-100) given as a nasal spray
What this could lead to
If it works, this could point toward a simple nasal spray to help memory in people with early memory loss.
What could go wrong
This was a very small, early study with only 13 participants, so results may not apply widely. Nasal insulin can cause low blood sugar or nose irritation.

This is an AI summary of the original study and may miss details. Read our disclaimer.

Study facts

What this study's own registry entry says, in plain language.

Phase

Phase 2

Tests whether the treatment actually works, and watches for side effects, in a larger group.

Participants

13 people

The number who actually took part.

Started

Jul 2020

Finished

Nov 2020

Lead sponsor

Other sponsor

The registry's catch-all category, for sponsors it does not file as a company, a government agency, or a research network.

Who can take part

This study's own entry requirements. Only the study team can say for certain whether you qualify.

Ages

55 to 85 years

Sex

Anyone

Healthy volunteers

Accepted

You do not need to have the condition being studied to take part.

Show the full entry requirements

Copied word for word from the study's registry entry, so the wording is the study team's rather than ours.

Inclusion Criteria: * Fluent in English * Cognitively normal or diagnosis of aMCI * Stable medical condition for 3 months prior to screening visit * Stable medications for 4 weeks prior to the screening and study visits * Clinical laboratory values must be within normal limits or, if abnormal, must be judged to be clinically insignificant by the study physician Exclusion Criteria: * A diagnosis of dementia * History of a clinically significant stroke * Current evidence or history in past two years of epilepsy, head injury with loss of consciousness, any major psychiatric disorder including psychosis, major depression, bipolar disorder * Diabetes (type I or type II) insulin dependent and non-insulin dependent diabetes mellitus * Current or past regular use of insulin or any other anti-diabetic medication within 2 months of screening visit. * History of seizure within past five years * Pregnancy or possible pregnancy. * Use of anticoagulants warfarin (Coumadin) and dabigatran (Pradaxa) * Residence in a skilled nursing facility at screening * Use of an investigational agent within two months of screening visit * Regular use of alcohol, narcotics, anticonvulsants, anti-parkinsonian medications, or any other exclusionary medications

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Conditions

The condition(s) this trial relates to.

Cognitive Dysfunction

As listed by the trial registrant

The condition terms exactly as the trial's registrant entered them.

Cognitive impairment Mild cognitive impairment

Contacts and locations

Locations

  • Wake Forest University Health Sciences

    Winston-Salem, North Carolina, 27157, United States

More trials for these conditions

Other studies related to the condition(s) this trial covers.