What is diosmin?
Diosmin is a flavonoid (a plant pigment and protective compound) made from hesperidin, which is found in the peel of citrus fruits like oranges.
Blood in your legs has to travel up to your heart against gravity. But when vein walls get loose, blood and fluid pool in your legs, making them swollen, heavy and tingly, and more prone to cramps.
Diosmin tightens these vein walls and reduces fluid leaking out of blood vessels. It also supports lymph flow (the system that drains extra fluid from your body), which may help ease swelling. In Europe and some other countries, it has enough research behind it to be used as an over-the-counter medicine ingredient for vein circulation and hemorrhoid symptoms.
Who it may help
- □ Your calves swell and feel heavy by evening
- □ You often get calf cramps while sleeping
- □ Your legs tingle and feel tight
- □ You stand or sit all day at work
- □ You're a woman over 40
- □ Your face, hands or feet are often puffy in the morning
Many people say swelling and tingling eased fairly quickly.
People with hemorrhoids often look for it too. For early-stage hemorrhoids — bleeding, pain, or tissue that pops out after a bowel movement and goes back in — it may help manage symptoms. Some people also keep taking it for maintenance after symptoms are under control. But see a doctor first to find out what stage your hemorrhoids are.
How to take diosmin and dosage
Bottom line: 600 mg a day, split between morning and evening.
| Product | How to take |
|---|---|
| 300 mg product | 1 tablet in the morning, 1 in the evening (600 mg a day) |
| 600 mg high-strength product | 1 tablet a day |
300 mg products used to be the norm, but now many high-strength products contain 600 mg per tablet.
When symptoms flare up, the dose is sometimes raised to as much as 1,800 mg a day for a short time. But that's a treatment dose, so don't increase it on your own — talk to your doctor or pharmacist.
How to choose a diosmin product
- Check how many mg of diosmin are in each tablet. A product that makes it easy to reach 600 mg a day is most convenient.
- If it's a blend, check that it has enough diosmin. Many US supplements mix diosmin with hesperidin, vitamin K2 and more. These blends offer good combinations and value, but their quality control may not be as strict as for medicines.
- Pick one main circulation ingredient. Grape leaf extract, centella (gotu kola) and diosmin are used for similar purposes. Rather than buying several at once, build around one.
Diosmin side effects
It's generally gentle, so there aren't many side effects to worry about. Just be aware of these:
- Dizziness or headache: Can happen as blood vessels relax.
- Stomach pain or upset: Less likely if you take it after a meal.
If the discomfort continues, lower the dose or stop. If one leg suddenly swells, hurts or turns red, don't rely on supplements — see a doctor right away.
Combinations
Works well with: Magnesium, Vitamin E, B vitamins (B complex)
Frequently asked questions
How much diosmin should I take a day?
The standard is 600 mg a day. With a 300 mg product, take 1 tablet in the morning and 1 in the evening; with a 600 mg product, take 1 tablet a day.
Does diosmin help with leg cramps?
It supports leg vein circulation, so it may help with cramps, swelling and tingling. If you cramp often, pairing it with magnesium is a common combination.
Can I take diosmin for hemorrhoids?
It's used to help manage symptoms of early-stage hemorrhoids. But have a doctor check the stage first, and talk to your doctor or pharmacist before raising the dose.
Does diosmin have side effects?
It's generally gentle. It can cause dizziness, headache or stomach pain, so take it after a meal, and lower the dose or stop if the discomfort continues.
Can pregnant women take diosmin?
Some sources say it's okay after the first 3 months of pregnancy, but always talk to your doctor first.
What's the difference between diosmin and hesperidin?
Diosmin is made from hesperidin, a compound in citrus peel. That's why many blends contain both.
Related concerns
Last updated 2026-10-12