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Can an ancient herbal remedy ease swelling in the eye?
NCT ID NCT05122702
First seen Jul 27, 2026 · Last updated Jul 28, 2026 · Updated 1 time
Summary
This phase 2 trial tests whether a modified Chinese herbal formula, Shenling Baizhu San, can reduce swelling in the retina (macular edema) and improve vision. Adults diagnosed with macular edema take either the herbal granules or a placebo twice daily for 12 weeks. The study measures changes in retinal thickness and visual clarity to see if the formula offers a safe, effective treatment.
What this could mean
Our plain-language read of the trial. This is informational only, not medical advice or a prediction.
- Active substance
- a modified Chinese herbal formula called Shenling Baizhu San
- What this could lead to
- If effective, this herbal formula could offer a new treatment option for macular edema, a condition with no cure.
- What could go wrong
- This is a small, early-phase trial with only 10 participants, so results may not apply broadly. Herbal formulas can also have side effects or interact with other medications.
This is an AI summary of the original study and may miss details. Read our disclaimer.
Study facts
What this study's own registry entry says, in plain language.
- Phase
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Phase 2
Tests whether the treatment actually works, and watches for side effects, in a larger group.
- Participants
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10 people
The number who actually took part.
- Started
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Jul 2022
- Finished
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Mar 2025
- Lead sponsor
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Other sponsor
The registry's catch-all category, for sponsors it does not file as a company, a government agency, or a research network.
Who can take part
This study's own entry requirements. Only the study team can say for certain whether you qualify.
- Ages
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18 to 80 years
- Sex
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Anyone
- Healthy volunteers
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Not accepted
This study is not open to healthy volunteers. The entry requirements below say who it is open to.
Show the full entry requirements Hide the full entry requirements
Copied word for word from the study's registry entry, so the wording is the study team's rather than ours.
Inclusion Criteria: * Both gender; * Age from 18 to 80 years; * Known diagnosed with ME; * Agree to under optical examination and willing to complete questionnaires and take medications as scheduled; and * Agree to participate in the study and provide written informed consent. (for those illiterate subjects, their family member can sign the consent form upon subject's agreement) Exclusion Criteria: * Known ocular media opacities, such as cataract, vitreous hemorrhage, asteroid hyalosis, that affect the determination of retinal thickness from OCT imaging; * Known clinically significant macular edema (CSME). The definition of CSME: if one or more of the following criteria are met 1) retinal thickening at or within 500 μm of the center of the macula; 2) hard exudates at or within 500 μm of the center of the macula, if associated with adjacent retinal thickening; 3) a zone or zones of retinal thickening one disc area in size, at least part of which is within one disc diameter of the center of the macula; * On concomitant oral or injectable corticosteroids, topical non-steroidal anti-inflammatory drugs (NSAID) eye drops, leukotriene inhibitors, anti-VEGF, immunosuppressants for the treatment of ME within past 6 months or other Chinese herbal medicine for the treatment of ME within past month; * Impaired hematological profile and liver / renal function exceeds the upper limit of the reference value by 2 times; * Documented pregnant or lactating; or * Subjects participating in other clinical studies at the same time.
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Conditions
The condition(s) this trial relates to.
As listed by the trial registrant
The condition terms exactly as the trial's registrant entered them.
Contacts and locations
Locations
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The Chinese University of Hong Kong
Shatin, Hong Kong
More trials for these conditions
Other studies related to the condition(s) this trial covers.