Using Capsaicin to Treat Swallowing Difficulties After Stroke

Capsaicin for Post-stroke Dysphagia

Phase 2 Interventional Cantonal Hospital of St. Gallen · NCT04470752

This study is testing if a spicy ingredient called Capsaicin can help people who have trouble swallowing after a stroke feel better.

Quick facts

PhasePhase 2
Study typeInterventional
Enrollment82 (estimated)
Ages18 Years and up
SexAll
SponsorCantonal Hospital of St. Gallen Academic / other
Locations1 site (St. Gallen, Saint Gallen)
Trial IDNCT04470752 on ClinicalTrials.gov

What this trial studies

This Phase 2 trial evaluates the effectiveness of oral Capsaicin in patients experiencing dysphagia following an acute ischemic stroke. Participants will be randomly assigned to receive either Capsaicin or a placebo, with treatment administered three times daily during meals or swallowing exercises supervised by a Speech Language Pathologist. After a week, patients with ongoing dysphagia will continue treatment for an additional 23 days, followed by a final swallowing assessment. The study aims to gather data on the efficacy of Capsaicin in improving swallowing function in this patient population.

Who should consider this trial

Good fit: Ideal candidates are adults who have suffered an acute ischemic stroke and have a significant impairment in oral intake.

Not a fit: Patients with dysphagia due to causes other than ischemic stroke or those with severe pre-existing swallowing difficulties may not benefit from this study.

Why it matters

Potential benefit: If successful, this treatment could significantly improve swallowing function in patients recovering from stroke-related dysphagia.

How similar studies have performed: While the use of Capsaicin for dysphagia is a novel approach, similar studies have shown promise in other conditions, suggesting potential for success.

Eligibility criteria

Show full inclusion / exclusion criteria
Inclusion Criteria:

* Acute ischemic Stroke
* Impairment of oral intake with FOIS ≤ 4
* Magnetic Resonance Imaging of the brain or CT scan with the finding of a subacute ischemic stroke
* Informed Consent within 48 hours after admission, following initial swallowing assessment

Exclusion Criteria:

* Diagnosis other than ischemic stroke
* Late patient admission \>48 hours after stroke onset
* Impairment of functional oral intake scale ≥ 5
* FEES \>72h after admission
* PAS \<2
* Pre-existing dysphagia
* Dysphagia due to other cause
* No evidence of stroke on imaging
* Recurrent stroke = at least one stroke in the course of the study apart from the index stroke
* Age \<18 years
* Current drug abuse
* Amphetamine or amphetamine-like Medication
* Regular oral treatment with chilli pepper extract
* Allergies or known adverse reactions to the consumption of chilli pepper or capsaicin
* Personality disorder
* Severe dementia or delirium
* Other reasons according to physician/investigator because of which the patient cannot participate in the study (not suitable for treatment or examinations)
* withdrawal of consent by participant at any time of the study

Where this trial is running

St. Gallen, Saint Gallen

Study contacts

How to participate

  1. Review the eligibility criteria above with your treating physician.
  2. Visit the official trial page on ClinicalTrials.gov for the most current contact information and recruitment status.
  3. Contact the listed study coordinator or principal investigator to request pre-screening. Pre-screening is free and never obligates you to enroll.
Conditions Dysphagia, Late Effect of StrokeDysphagiaStroke
Last reviewed 2026-06-09 by the Find a Trial editorial team. Information on this page is for educational purposes and is not medical advice. Always consult qualified healthcare professionals about clinical trial participation.