Linezolid for Syphilis Pilot Study

NCT ID: NCT05548426

Last Updated: 2025-02-17

Study Results

Results pending

The study team has not published outcome measurements, participant flow, or safety data for this trial yet. Check back later for updates.

Basic Information

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Recruitment Status

RECRUITING

Clinical Phase

PHASE2

Total Enrollment

24 participants

Study Classification

INTERVENTIONAL

Study Start Date

2023-09-28

Study Completion Date

2026-03-31

Brief Summary

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The study aims to evaluate the efficacy of linezolid for the treatment of syphilis.

Detailed Description

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This will be a randomized, open-label, non-comparative, adaptive pilot trial to evaluate the efficacy of linezolid 600mg orally, twice a day, for five or ten days, using a contemporaneous historical control group benzathine penicillin G (single dose of 2.4 million units) in participants with and without HIV infection.

In total, 24 participants will be enrolled across multiple clinical sites in the United States. Participants will participate in follow-ups to monitor clinical outcomes and serological response (RPR titer) at 1 month, 3 months, and 6 months.

Study findings may identify an efficacious alternative syphilis treatment to penicillin that is effective for people living with HIV. Study findings may also help address the crisis of penicillin shortages, difficulty in administration, and offer options for those with penicillin allergy.

Conditions

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Syphilis

Study Design

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Allocation Method

RANDOMIZED

Intervention Model

PARALLEL

Primary Study Purpose

TREATMENT

Blinding Strategy

NONE

Study Groups

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Linezolid 10 Day

Oral linezolid 600mg, taken twice a day for 10 days

Group Type EXPERIMENTAL

Group B, Linezolid 10d

Intervention Type DRUG

Oral Linezolid 600mg, taken twice a day for 10 days

Benzathine Penicillin G

Single intramuscular injection of 2.4 million units of benzathine penicillin G

Group Type ACTIVE_COMPARATOR

Group A, Penicillin

Intervention Type DRUG

Standard of care benzathine penicillin G, one intramuscular injection, 2.4MU

Interventions

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Group B, Linezolid 10d

Oral Linezolid 600mg, taken twice a day for 10 days

Intervention Type DRUG

Group A, Penicillin

Standard of care benzathine penicillin G, one intramuscular injection, 2.4MU

Intervention Type DRUG

Other Intervention Names

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zyvox bicillin

Eligibility Criteria

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Inclusion Criteria

* 16 years of age or older
* Diagnosed cases of primary, secondary, or early latent syphilis with RPR titer ≥1:8 within 3 weeks prior to enrollment
* Able to provide informed consent
* For PLHIV: on treatment for HIV-infection and most recent viral load \<200 copies/mL or most recent CD4 T-cell count \>350 cells/mL

Exclusion Criteria

* Pregnancy or a positive pregnancy test on the day of enrollment
* Participants who receive certain psychotropic medications, e.g., MAO inhibitors, SNRIs, SSRIs
* Patients showing signs and symptoms of neurosyphilis
* Serofast RPR titer
* Recent (\<7 days) or concomitant antimicrobial therapy with azithromycin, doxycycline, ceftriaxone, cefixime, or other beta lactam antibiotics (e.g. amoxicillin)
* Linezolid or penicillin allergy
Minimum Eligible Age

16 Years

Eligible Sex

ALL

Accepts Healthy Volunteers

No

Sponsors

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Universidad Peruana Cayetano Heredia

OTHER

Sponsor Role collaborator

The University of Texas Health Science Center, Houston

OTHER

Sponsor Role collaborator

University of Southern California

OTHER

Sponsor Role lead

Responsible Party

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Jeffrey D Klausner

Clinical Professor

Responsibility Role PRINCIPAL_INVESTIGATOR

Principal Investigators

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Jeffrey D Klausner, MD MPH

Role: PRINCIPAL_INVESTIGATOR

University of Southern California

Locations

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Howard Brown Health

Chicago, Illinois, United States

Site Status RECRUITING

Open Arms HealthCare Center

Jackson, Mississippi, United States

Site Status RECRUITING

Countries

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United States

Central Contacts

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Jeffrey D Klausner, MD MPH

Role: CONTACT

(415) 876-8901

Facility Contacts

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Catherine Creticos, MD

Role: primary

Keith Stokes, MD

Role: primary

Other Identifiers

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APP-22-04165

Identifier Type: -

Identifier Source: org_study_id

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