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A double-blind, multi-centre, randomized, placebo-controlled cross-over clinical trial to assess the efficacy of doxyPEP in reducing the incidence of bacterial STIs among MSM and TGW living with HIV in Belgium (DoxHIV study)

Status
Recruiting
Phases
Phase 3
Study type
Interventional
Source
EU CTIS
Registry ID
CTIS2025-521153-16-00
Enrollment
200
Registered
2025-06-02
Start date
2025-12-05
Completion date
Unknown
Last updated
2025-06-02

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

Conditions

bacterial sexually transmitted infections

Brief summary

Incidence rate ratio of symptomatic NG, CT, and all TP infections in the doxyPEP vs placebo arms

Detailed description

Rate ratio of tetracyclines, macrolides, cephalosporins, and penicillins in the doxyPEP vs placebo arms, MIC distribution (doxycycline/cefixime/ciprofloxacin) of commensal Neisseria spp. and E. coli in the doxyPEP vs placebo arms, Microbiota diversity, microbiota richness, abundance and diversity of Bifidobacteria, Fusobacterium, Lactobacillaceae, Enterobacteriaceae and Bacteroidaceae in both arms. Abundance of resistance genes (tetracyclines and other classes of antimicrobials) in both arms, Incidence rate ratio of symptomatic NG infections in the doxyPEP vs placebo arms, Incidence rate ratio of symptomatic CT infections in the doxyPEP vs placebo arms, Incidence rate ratio of symptomatic TP infections in the doxyPEP vs placebo arms, Incidence rate ratio of all NG infections in the doxyPEP vs placebo arms, Incidence rate ratio of all CT infections in the doxyPEP vs placebo arms, Incidence rate ratio of all TP infections in the doxyPEP vs placebo arms, Tetracycline MIC distribution of NG isolates in the doxyPEP vs placebo arms

Interventions

DRUGPlacebo capsules for Doxycycline 200 mg (Empty Hpmc capsule
DRUGswedish orange filled with microcrystalline cellulose)
DRUGDoxycycline EG 100 mg tabletten

Sponsors

Institute Of Tropical Medicine
Lead SponsorOTHER

Eligibility

Sex/Gender
Male
Age
18 Years to No maximum

Design outcomes

Primary

MeasureTime frame
Incidence rate ratio of symptomatic NG, CT, and all TP infections in the doxyPEP vs placebo arms

Secondary

MeasureTime frame
Rate ratio of tetracyclines, macrolides, cephalosporins, and penicillins in the doxyPEP vs placebo arms, MIC distribution (doxycycline/cefixime/ciprofloxacin) of commensal Neisseria spp. and E. coli in the doxyPEP vs placebo arms, Microbiota diversity, microbiota richness, abundance and diversity of Bifidobacteria, Fusobacterium, Lactobacillaceae, Enterobacteriaceae and Bacteroidaceae in both arms. Abundance of resistance genes (tetracyclines and other classes of antimicrobials) in both arms, Incidence rate ratio of symptomatic NG infections in the doxyPEP vs placebo arms, Incidence rate ratio of symptomatic CT infections in the doxyPEP vs placebo arms, Incidence rate ratio of symptomatic TP infections in the doxyPEP vs placebo arms, Incidence rate ratio of all NG infections in the doxyPEP vs placebo arms, Incidence rate ratio of all CT infections in the doxyPEP vs placebo arms, Incidence rate ratio of all TP infections in the doxyPEP vs placebo arms, Tetracycline MIC distribution of N

Countries

Belgium

Outcome results

None listed

Source: EU CTIS · Data processed: Feb 4, 2026