Clinical trial Recruiting at 1 site Interventional Ages 18 to 60

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

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

Run by University of Calgary · NCT05914649 · Data updated 2026-11-12

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

Quick facts

Study typeInterventional
Ages18 Years to 60 Years
SexAll
Enrollment100 (estimated)
SponsorUniversity of Calgary
Academic / other
Locations1 site (Calgary, Alberta)
StatusRecruiting
StartedSeptember 19, 2024
Main results expectedDecember 31, 2030
Study endsDecember 31, 2030
Registry record updatedMay 7, 2026
Trial IDNCT05914649 on ClinicalTrials.gov

Is this trial a fit for you?

Likely a good fit

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

Probably not a fit

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

A plain-English reading of the study's rules. Only the study team can confirm whether you qualify.

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.

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 gone: 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.

Who can join: the full rules

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 it's running

  • University of Calgary
    Calgary, Alberta, Canada
    Recruiting

Study contacts

Similar studies

Other studies for the same condition or treatment. Recruiting studies are listed first.

How to take part

  1. Review the eligibility criteria above with your treating physician.
  2. Check the official listing on ClinicalTrials.gov for the latest contact details and recruitment status.
  3. Contact the study coordinator or principal investigator to ask for pre-screening. Pre-screening is free and never obligates you to enroll.
Last reviewed 2026-11-14 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.