Doxycycline Hyclate is named as an intervention in 2 current clinical trials in our China and Canada registers. 2 are recruiting patients now. All registered phases are Not applicable. The sponsor with the most trials is Sun Yat-sen University (1). The most-studied condition is Thyroid Associated Ophthalmopathy.
Of the three regulators tracked here, the first to approve Doxycycline Hyclate was the US, on 5 Dec 1967. It is approved in 2 of the 3 regulators tracked here.
From the regulators' own registers: FDA Drugs@FDA, the EMA medicines list and Health Canada's Notice of Compliance database. Dates are the first listed approval of a product containing only this substance; combination products and nationally authorised EU medicines are not counted.
Protections still running for marketed products containing Doxycycline Hyclate, as listed by the regulators. Expired patents and exclusivities, and discontinued products, are not shown.
Reproduced from the FDA Orange Book and Purple Book (checked 28 Sep 2026) and the European Commission's Union Register of medicinal products (CC BY 4.0; the EU expiry date is calculated exactly as the Commission's register displays it). Listed patents and dates are as submitted to or published by the regulator and may not reflect litigation, invalidation, settlements, lapsed fees or later extensions. This is not legal advice or a freedom-to-operate opinion, and it does not say when a generic or biosimilar will launch.
From NHSBSA Prescription Cost Analysis (Open Government Licence v3.0) and CMS State Drug Utilization Data. Both are gross amounts: neither system publishes its discounts or rebates per drug. Products combining several substances are not counted here.
Mechanisms and diseases from ChEMBL via the Open Targets Platform (release 26.09), ChEMBL record CHEMBL2364574, CC BY-SA 3.0. Targets checked against the IUPHAR/BPS Guide to PHARMACOLOGY (2026.3), ligand 6464, CC BY-SA 4.0. Trial phases are not approvals: approved uses are shown from the regulators' own records where we hold them.
| Study | Phase | Status | Lead sponsor | Registers |
|---|---|---|---|---|
|
Doxycycline Intervention for Bacterial STI ChemoprOphylaxis (DISCO)
NCT04762134 · Bacterial Sexually Transmitted Diseases
|
Not applicable | Recruiting | Jonathan Troy Grennan | Canada |
|
Multi-model Image of Doxycycline in TAO
NCT05112211 · ClinicalTrials.gov ↗ · Thyroid Associated Ophthalmopathy
|
Not applicable | Recruiting | Sun Yat-sen University | China |
Registers list studies that are recruiting, about to open, active but closed to enrolment, or enrolling by invitation. The UK and USA registers cover industry-sponsored studies only. Trial titles and statuses are copied from the registry as published.
| Lead sponsor | Trials |
|---|---|
| Sun Yat-sen University | 1 |
| Jonathan Troy Grennan | 1 |
| Register | Trials | Recruiting |
|---|---|---|
| Clinical trials in China | 1 | 1 |
| Clinical trials in Canada | 1 | 1 |
A trial with sites in more than one country appears in each of those registers.
2 current trials in our China and Canada registers name Doxycycline Hyclate as a drug or biological intervention, as of the registry sync on 1 October 2026. Completed and withdrawn studies are not counted.
Yes. 2 of the 2 trials are recruiting: 1 with sites in China and 1 with sites in Canada. Eligibility and site contacts are on each trial's record. Only the study team can confirm whether a patient is eligible.
Sun Yat-sen University (1) and Jonathan Troy Grennan (1). The number in brackets is how many trials each organisation leads.
Every trial, status, phase and sponsor on this page is copied from public ClinicalTrials.gov records by a daily sync. Nothing here describes how Doxycycline Hyclate works or whether it is effective, and it is not medical advice.
Everything on this page is copied from public ClinicalTrials.gov registry records — it is not written from memory, and nothing here describes how Doxycycline Hyclate works or whether it is effective. Each trial links to its own record so you can check it yourself.
This page is built automatically: a daily sync job reads the registry records behind our country trial registers, collects every trial that lists Doxycycline Hyclate (or a registered synonym) as a drug or biological intervention, and tabulates the registry fields directly. Placebos and generic comparators are excluded. There is no AI drafting and no per-compound editorial pass, and the page has not been clinically reviewed. The “last verified” date above is the timestamp of that sync, not a review date. Our general editorial approach is described in our editorial standards and corrections policy. The ClinicalTrials.gov data on this page was last retrieved on 1 Oct 2026. How every register is built: methodology · fixes we have made: corrections log.