Evidence-based·Last reviewed May 30, 2026·How we grade evidence

Diosmin

PhytochemicalFlavonoidBest with a meal

Useful mainly for people with chronic venous insufficiency or symptomatic hemorrhoids.

Quick decision guide

May help most

people with chronic venous insufficiency or symptomatic hemorrhoids

Common dosing range

450 mg diosmin + 50 mg hesperidin twice daily (1000 mg/day)

When to expect effects

Weeks for venous symptoms; days for acute hemorrhoid flares

Watch out for

Limited pregnancy data; coordinate with anticoagulant therapy

What is it

Diosmin is a citrus-derived flavonoid glycoside (a glycoside of diosmetin) used clinically for chronic venous insufficiency and hemorrhoids, most often combined with hesperidin.

Is it worth it for you?

Use this as a quick fit check, not a diagnosis.

Worth considering if

You have leg heaviness, swelling, or pain from chronic venous insufficiency
You have hemorrhoid symptoms and want a non-surgical adjunct
You can use the studied micronized flavonoid form

Probably skip if

You expect it to cure varicose veins structurally
You are pregnant without clinician guidance
You want a general 'circulation booster' with no venous diagnosis

Evidence at a glance

chronic venous insufficiency

Good Evidence
Effect
Modest reduction in leg symptoms and edema
Best fit
adults with CEAP-classified venous insufficiency and leg edema or heaviness
Time
Weeks

hemorrhoids

Good Evidence
Effect
Reduced bleeding and symptom duration
Best fit
adults with acute or recurrent symptomatic hemorrhoids
Time
Days

Evidence for 2 uses

AI-assisted evidence assessment — talk to your doctor before relying on any single supplement.

chronic venous insufficiency

Disease adjunct
Good Evidence

Most evidence is for the micronized purified flavonoid fraction (90% diosmin), which improves venous tone, reduces capillary leak, and dampens venous wall inflammation. Trials and reviews report reduced leg heaviness, pain, and edema. It manages symptoms rather than reversing underlying venous structural disease.

Effect size
Modest reduction in leg symptoms and edema
Time to effect
Weeks
Best fit
adults with CEAP-classified venous insufficiency and leg edema or heaviness
Less likely
people with leg complaints unrelated to venous disease

Bottom line: A reasonable symptomatic adjunct for venous insufficiency, best as the micronized flavonoid form.

hemorrhoids

Disease adjunct
Good Evidence

Flavonoid therapy with diosmin (usually as MPFF with hesperidin) reduces bleeding, pain, and symptom duration in acute hemorrhoid flares, with loading doses used short term. Effects are symptomatic and adjunctive to standard care. Evidence quality is moderate and several trials use proprietary formulations.

Effect size
Reduced bleeding and symptom duration
Time to effect
Days
Best fit
adults with acute or recurrent symptomatic hemorrhoids

Bottom line: A useful short-term adjunct for acute hemorrhoid symptoms.

How it works

Diosmin improves venous tone by prolonging noradrenergic vasoconstriction, reduces capillary leak, and dampens venous wall inflammation by limiting leukocyte adhesion. Most clinical evidence is for the micronized purified flavonoid fraction (MPFF: 90% diosmin, 10% other flavonoids).

How to take it

1. Typical dose
450 mg diosmin + 50 mg hesperidin twice daily (1000 mg/day)
2. Higher studied dose
Up to 3000 mg/day for acute hemorrhoid flares (loading)
3. Timing
Morning and evening
4. With food
With meals to reduce GI upset
5. Split dosing
Divide between morning and evening
6. How long to try
Several weeks to months for venous insufficiency; short loading course for acute hemorrhoids

What to track

leg heaviness and swelling
ankle/calf circumference
hemorrhoid bleeding and pain
GI tolerance

2 commercial forms

Compare the main delivery options and what they’re best suited for.

MPFF (Daflon, Detralex)

Standard clinical-evidence format.

Micronized form improves absorption.

Plain diosmin

Lower price, less validation.

Lower bioavailability than micronized form.

Safety

Know the common side effects, key cautions, and who should avoid it.

Common side effects

mild GI upsetheadachedizziness

Who should avoid it

  • pregnant women without clinician guidance

Pregnancy & breastfeeding

Pregnancy data are limited; use only under clinical guidance.

Interactions

anticoagulants (e.g., warfarin)Moderate

Possible additive effect on bleeding risk

CYP450 substratesMinor

May affect CYP enzyme activity at high doses

Food sources

Citrus peel and pith

Amount
trace natural diosmin
%DV

Choosing a product

What to look for on the label — and what to be skeptical of.

Look for

micronized or purified diosmin
diosmin + hesperidin combination (e.g., 450 mg / 50 mg)
stated flavonoid fraction

Be skeptical of

'eliminates varicose veins'
'cures hemorrhoids permanently'
'whole-body circulation cure'

Frequently asked questions

Will diosmin make varicose veins disappear?

No. It eases symptoms but does not remove varicose veins.

How long does it take to work?

Most people notice symptom improvement in 2-4 weeks.

References by claim

chronic venous insufficiency

Kakkos et al., 2018PubMed (2018) link

Serra et al., 2021PMC (2021) link

hemorrhoids

Bashankaev et al., 2018PubMed (2018) link

Thanapongsathorn et al., 1992PubMed (1992) link

Track Diosmin with Pilora

Set up dose reminders, check interactions, and join the community in the Pilora iPhone app.

Coming to App Store
Evidence-based·Last reviewed May 30, 2026·Evidence current as of May 30, 2026·How we grade evidence

Disclaimer: These statements have not been evaluated by the FDA. This page is educational, not a substitute for personalized medical advice. Evidence grades are AI-assisted assessments — talk to your doctor before starting any new supplement, especially if you’re pregnant, breastfeeding, on medications, or managing a chronic condition.