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Sonlicromanol in Post-COVID

SON4PEM Study: Sonlicromanol in Post-COVID: A Randomized, Double-blind, Placebo-controlled, Phase II Trial

Status
Recruiting
Phases
Phase 2
Study type
Interventional
Source
ClinicalTrials.gov
Registry ID
NCT07298005
Acronym
SON4PEM
Enrollment
80
Registered
2025-12-22
Start date
2026-04-03
Completion date
2027-03-01
Last updated
2026-08-18

For informational purposes only — not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

Post COVID Condition

Brief summary

The aim of this randomized, double-blind, placebo-controlled, phase II trial, is to study the effect of sonlicromanol on fatigue in patients with post-COVID who experience post-exertional malaise (PEM).

Interventions

Sonlicromanol 90mg twice daily for 13 weeks

DRUGPlacebo

Placebo twice daily for 13 weeks

Sponsors

Michele van Vugt
Lead SponsorOTHER
ZonMw: The Netherlands Organisation for Health Research and Development
CollaboratorOTHER
Khondrion BV
CollaboratorINDUSTRY

Study design

Allocation
RANDOMIZED
Intervention model
PARALLEL
Primary purpose
TREATMENT
Masking
QUADRUPLE (Subject, Caregiver, Investigator, Outcomes Assessor)

Eligibility

Sex/Gender
ALL
Age
18 Years to 65 Years
Healthy volunteers
No

Inclusion criteria

* Post COVID according to WHO criteria and verified by post COVID physician * Post-exertional malaise (PEM) according to DSQ-PEM questionnaire * Bell's disability score 20-70% * Mild initial SARS-CoV-2 infection (no hospitalisation) * WHO performance score of 0 before initial SARS-CoV-2 infection

Exclusion criteria

* Patients at risk for cardiac conduction disorders * History of clinical significant gastro-intestinal surgery or dysmotility that impairs the adsorption of the IMP * Clinically significant respiratory or cardiovascular disease * Unstable neurological disease * Clinically significant active psychiatric disorder that requires treatment * History of substance abuse * Active malignancy within the past 5 years * History of solid organ transplantation * Active HIV, hepatitis B or C infection * BMI \< 18.5 or \> 35 * Pregnancy or breastfeeding * Clinically relevant laboratory test value outside the reference range * Use of the following medication, unless stable for at least one month before study and remaining stable throughout the study: (multi)vitamins, co-enzyme Q10, Vitamin E, riboflavin, amino acids, antioxidant supplements and any medication negatively influencing mitochondrial functioning (including but not limited to valproic acid, glitazones, statins, antivirals, amiodarone and NSAIDs) * Use of the following medication: any moderate or strong Cytochrome P450 (CYP)3A4 inhibitors (all 'conazoles-anti-fungals', HIV antivirals, grapefruit), strong CYP3A4 inducers ((including HIV antivirals, carbamazepine, phenobarbital, phenytoin, rifampicin, St. John's wort, pioglitazone, troglitazone) or any medication metabolized by CYP3A4 with a narrow therapeutic index, medication known to be substrate of Organic Cation Transporter 1 (OCT1) and organic cation transporter 2 (OCT2) or strong P-glycoprotein inhibitors (including amiodarone, azithromycin, captopril, clarithromycin, cyclosporine, piperine, quercetin, quinidine, quinine, reserpine, ritonavir, tariquidar, and verapamil). * Use of any medication known to affect cardiac repolarization unless QTc interval at screening is normal during stable treatment for a period of two weeks, or 5 half-lives

Design outcomes

Primary

MeasureTime frameDescription
FatigueBetween group differences at week 13Post-COVID related fatigue measured with the Fatigue Assessment Scale (FAS), a 10-item questionnaire measuring physical/mental fatigue (ranging from 10-50), with scores \<22 indicating no fatigue, 22-34 mild-to-moderate, and ≥35 severe fatigue

Secondary

MeasureTime frameDescription
Muscle strengthBetween group differences at week 13Muscle strength measured with the Repeated Handgrip Strength of the dominant hand
Cognitive functionBetween group differences at week 13Post-COVID related cognitive function measured with the PROMIS cognitive function SF 8a, measures self-perceived cognitive abilities, with scores converted to a T-score (mean 50, SD 10), where higher scores indicate better functioning
Health related quality of lifeBetween group differences at week 13Health related quality of life measured with the SF-36 questionnaire with scores ranging from 0-100, where higher scores indicate better quality of life
FatigueBetween group differences at week 13Post-COVID related fatigue measured with the NeuroQoL SF Fatigue, resulting in a T-score (mean 50, SD 10) where higher scores mean more fatigue

Countries

Netherlands

Outcome results

None listed

Source: ClinicalTrials.gov · Data processed: Aug 19, 2026