Testing IV saline for cognitive function in POTS and Long COVID patients

Neurocognitive Testing in Long COVID and Postural Tachycardia Syndrome Patients With Normal Saline: A Pilot Study

Not applicable Interventional University of Calgary · NCT05914649

This study is testing whether IV saline can help improve brain fog and mental fatigue in people with POTS and Long COVID.

Quick facts

PhaseNot applicable
Study typeInterventional
Enrollment100 (estimated)
Ages18 Years to 60 Years
SexAll
SponsorUniversity of Calgary Academic / other
Locations1 site (Calgary, Alberta)
Trial IDNCT05914649 on ClinicalTrials.gov

What this trial studies

This study investigates the effects of intravenous (IV) saline on cognitive dysfunction in patients diagnosed with Postural Orthostatic Tachycardia Syndrome (POTS) and Post-Acute Sequelae of COVID (Long COVID). Participants will receive either a 999 mL infusion of normal saline or a placebo of 50 mL saline to assess improvements in cognitive function, specifically targeting symptoms like brain fog and mental fatigue. The study aims to provide initial insights into the neurocognitive impairments associated with these conditions and evaluate the potential therapeutic role of saline infusions. By comparing cognitive performance before and after treatment, the researchers hope to establish a foundation for future studies on underlying mechanisms and treatments.

Who should consider this trial

Good fit: Ideal candidates include individuals aged 18 to 60 with a diagnosis of Long COVID or POTS who experience cognitive dysfunction.

Not a fit: Patients with overt causes for POTS or those unable to provide informed consent may not benefit from this study.

Why it matters

Potential benefit: If successful, this study could lead to improved cognitive function and quality of life for patients suffering from POTS and Long COVID.

How similar studies have performed: While there is limited research specifically on saline infusions for cognitive dysfunction in these populations, the study's approach is novel and aims to fill a significant gap in understanding.

Eligibility criteria

Show full inclusion / exclusion criteria
Inclusion Criteria:

* Patients with diagnosis of Long COVID
* SARS-COV2 test positive
* Symptoms \> 12 weeks post COVID
* Subjective complaint of 'brain fog" or cognitive dysfunction
* Patients with diagnosis of Postural Orthostatic Syndrome (POTS) from the Calgary Autonomic Investigation and Management Clinic
* Subjective complaint of 'brain fog" or cognitive impairment
* Healthy participants
* Without POTS or "brain fog"
* Age 18 to 60 years
* Female and Male
* Able to give an informed consent

Exclusion Criteria:

* Patients with overt causes for POTS (e.g., dehydration, prolonged bed rest)
* An inability to safely withdraw from medicine(s) that could make test interpretation difficult and impossible.
* Other factors which are in the investigator's opinion would prevent the participant from completing the protocol, including poor compliance during previous studies or an unpredictable schedule.
* Unable to give an informed consent.

Where this trial is running

Calgary, Alberta

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 Postural Orthostatic Tachycardia SyndromePost Acute Sequelae of SARS CoV 2 InfectionPOTSLong COVIDCognitiveBrain Fog
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.