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Methylene Blue Treatment of COVID-19

Evaluation of the Efficacy of Methylene Blue Administration in SARS-CoV2- Affected Patients: a Phase 2, Randomized, Placebo- Controlled, Single Blind Clinical Trial

Status
Completed
Phases
Phase 2
Study type
Interventional
Source
ClinicalTrials.gov
Registry ID
NCT04635605
Enrollment
29
Registered
2020-11-19
Start date
2020-11-05
Completion date
2021-08-13
Last updated
2025-08-17

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

Conditions

SARS-CoV2

Brief summary

Despite enormous progress in understanding COVID-19, there is little evidence that a solution, therapeutic or preventive, is close to being achieved. Repurposing of well known, widely available drugs represent an attractive approach to speed up availability of active treatments. Such substances as i.e. hydroxychloroquine and others, are already under investigation and in widespread off label use. For many reasons Methylene blue (MB), the oldest synthetic substance in medicine (1876 synthesized by BASF) is such a promising candidate for an active treatment against SARS-CoV-2 infected people and for COVID-19 patients.

Interventions

DRUGMethylene Blue

Treatment Group. Methylene Blue 100 mg capsules, twice a day for 5 consecutive days, will be added to the current therapy of the patient, if any.

Arm B: Control Group. Placebo capsules 100 mg twice a day for 5 consecutive days, will be added to the current therapy of the patient, if any.

Sponsors

Fondazione Epatocentro Ticino
Lead SponsorOTHER

Study design

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

Intervention model description

This is a phase 2 proof of concept, randomized, placebo controlled, single blind clinical trial on the efficacy of Methylene Blue against SARS-CoV-2 infection in patients with recently diagnosed SARS-CoV-2 infection

Eligibility

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

Inclusion criteria

are: * signed informed consent * age ≥ 18 years * microbiologically confirmed SARS-CoV-2 infection * negative pregnancy test in women of child-bearing age

Exclusion criteria

are: * documented refusal to participate in the study * known G-6-Phophatase deficiency * treatment with a serotoninergic drug

Design outcomes

Primary

MeasureTime frameDescription
to compare the viral load kinetics in the enrolled patients with a SARS-CoV-2 positive nasopharyngeal swab demonstrating a reduction of the area under the curve day 0- day 21 of at least 25%day 0 - day 21As primary outcome we will measure the viral load kinetics in the enrolled patients. This means the viral load (expressed as cycled of replication with the PCR method and the number of RNA copies) at baseline and at each scheduled timepoint of the study

Secondary

MeasureTime frameDescription
To calculate the percentage of patients having a reduction of viral load of > 2 log by day 3day 3We calculate the number of patients (expressed as percentage) that have a decreased viral load (expressed as RNA copies) greater than 2 log by day three
To calculate the percentage of patients having a poor outcome as measured by the need of hospitalization for COVID-193, 6, 9, 12, 15, 21, 28 and 84 days after diagnosisWe calculate the number of patients (expressed as percentage) that need hospitalization due to COVID-19, within the timeframe of the study
To calculate the percentage of patients clearing SARS-CoV-2 by 3, 6, 9, 12, 15 and 21 days after diagnosis3, 6, 9, 12, 15 and 21 days after diagnosisWe report the number of patients (expressed as percentage) with negative oro-pharyngeal swab at the scheduled time-points
Safety and tolerability of the administered drug are registered as adverse events, which are all symptoms related or supposed to be related to the drug that appeared after the drug intake and were NOT present at baseline or before3, 6, 9, 12, 15, 21, 28 and 84 days after diagnosisSafety and tolerability of the administered drug are registered as adverse events, which are all symptoms related or supposed to be related to the drug that appeared after the drug intake and were NOT present at baseline or before Adverse events are expressed as present (1) or absent (0), in the dedicated data sheet which will be collected at each scheduled visit
To measure the compliance by calculating the number of capsules taken by the patient and the overall number of patients who complete the treatment3, 6, 9, 12, 15 and 21 days after diagnosisWe calculate the number of pills (expressed as absolute number) taken by each enrolled patient during the study
To calculate the percentage of patients aliveat 28-days and 84-daysWe calculate the number of patients (expressed as percentage) still alive at day 28 and 84 of samples collection

Countries

Switzerland

Outcome results

None listed

Source: ClinicalTrials.gov · Data processed: Feb 4, 2026