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Could a simple zinc pill make botox last longer for voice spasms?

NCT ID NCT05892770

Symptom relief Sponsor: University of Florida 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 Results may not be published yet.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This status has not been confirmed recently, so it may be out of date.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 Jul 27, 2026 · Last updated Jul 28, 2026 · Updated 1 time

Summary

This trial tests whether taking zinc supplements for five days before a Botox injection into the vocal cords can extend the treatment's benefits for people with spasmodic dysphonia, a condition that causes involuntary voice spasms. Participants will take a 50 mg zinc gluconate pill each morning before their next scheduled Botox appointment. Researchers will track voice quality and quality of life over two injection cycles to see if zinc makes a difference.

What this could mean

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

Active substance
zinc gluconate supplement taken for five days before a Botox injection into the vocal cord muscle
What this could lead to
If zinc boosts Botox's staying power, people with spasmodic dysphonia might need fewer injections and enjoy longer periods of normal voice.
What could go wrong
This is a very early, small trial with only 32 participants. The only prior evidence comes from facial aesthetics, not voice disorders, so results may not translate.

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 1/2

Runs two stages together: safety and dose first, then whether the treatment works.

Participants

32 people

The number who actually took part.

Started

Aug 2023

Finished

Mar 2025

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

18 to 99 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: * Adults patients * 18 years old and above * Current diagnosis of ADductor spasmodic dysphonia * Has had Botox injection treatments for SD \> 6 months Exclusion Criteria: * Pregnant * Diagnosis of ABductor spasmodic dysphonia * Patients taking \> 30 mg zinc supplementation daily prior to study beginning

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Conditions

The condition(s) this trial relates to.

spasmodic dystonia

As listed by the trial registrant

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

Spasmodic dysphonia

Contacts and locations

Locations

  • University of Florida- Shands Hospital

    Gainesville, Florida, 32610, United States

More trials for these conditions

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