Last reviewed 2026-05-20 · How we verify

Doxycycyline

Los Angeles LGBT Center · Phase 1 active Small molecule ✓ Verified May 2026

Doxycycyline is a Small molecule drug developed by Los Angeles LGBT Center. It is currently in Phase 1 development.

Doxycycline is used to prevent syphilis in high-risk, HIV-positive men who have sex with men. It works by inhibiting bacterial protein synthesis, as indicated by its mechanism of action in the ChEMBL database.

Likelihood of approval

9.6% vs 9.6% industry baseline

If approved by FDA: likely 2033–2036

Steps remaining: Phase 2 → Phase 3 → NDA/BLA submission

Confidence: Medium

Why this estimate

Baseline phase 1 → approval rate +9.6pp
Industry-wide phase 1 drugs reach approval ~9.6% of the time (BIO/Informa 2023 industry benchmark across all therapeutic areas).

Predicted approval windows by jurisdiction (conditional on FDA approval)

Regulator	Country	Likely year	Lag vs FDA
FDA	US	2033–2036	—
EMA	EU	2034–2037	+0.7 yr
MHRA	GB	2034–2037	+0.7 yr
Health Canada	CA	2034–2038	+0.9 yr
TGA	AU	2034–2038	+1.2 yr
PMDA	JP	2034–2038	+1.5 yr
NMPA	CN	2035–2039	+2.3 yr
MFDS	KR	2034–2038	+1.4 yr
CDSCO	IN	2034–2039	+1.8 yr
ANVISA	BR	2035–2039	+2.3 yr

Hover any row for the lag rationale. Lag estimates are reduced when the drug has FDA Breakthrough or EMA PRIME designation (sponsors file globally in parallel).

Estimate based on the BIO/Informa industry phase transition rates plus per-drug modifiers for therapeutic area, sponsor type, FDA designations, mechanism, and trial design. Per-jurisdiction lags from Tufts CSDD international approval studies. Not investment, clinical or regulatory advice. Methodology: /methodology#likelihood.

At a glance

Generic name	Doxycycyline
Sponsor	Los Angeles LGBT Center
Modality	Small molecule
Therapeutic area	Other
Phase	Phase 1

Approved indications

No approved indications tracked.

Common side effects

No common side effects on file.

Key clinical trials

Efficacy of Doxycycline Prophylaxis to Reduce Syphilis in High-Risk, HIV-Positive MSM (NA)

Primary sources

Every claim on this page is sourced from regulatory or scientific primary sources. See our editorial policy for full methodology.

Source	Used for
ClinicalTrials.gov	Trial enrolment, design, endpoints, results

Competitive intelligence

For the full competitive landscape — auto-detected comparators, recent regulatory actions across the set, upcoming PDUFA, patent timeline, sponsor landscape:

Doxycycyline CI brief — competitive landscape report
Doxycycyline updates RSS · CI watch RSS
Los Angeles LGBT Center portfolio CI

Frequently asked questions about Doxycycyline

What is Doxycycyline?

Doxycycyline is a Small molecule drug developed by Los Angeles LGBT Center.

Who makes Doxycycyline?

Doxycycyline is developed by Los Angeles LGBT Center (see full Los Angeles LGBT Center pipeline at /company/los-angeles-lgbt-center).

What development phase is Doxycycyline in?

Doxycycyline is in Phase 1.

Manufacturer: Los Angeles LGBT Center — full pipeline
Therapeutic area: All drugs in Other

Primary sources · FDA · ClinicalTrials.gov · EMA · SEC EDGAR · ChEMBL · Wikidata · full sourcing