Varicose Veins/Venous Insufficiency
About 20 double-blind,
studies, enrolling a total of more than 2,000 participants, have examined oxerutins' effectiveness for treating varicose veins and venous insufficiency. Virtually all found oxerutins significantly more effective than placebo, giving substantial relief from swelling, aching, leg pains, and other uncomfortable symptoms, while causing no significant side effects.
For example, one large double-blind, placebo-controlled study published in 1983 enrolled 660 people with symptoms of venous insufficiency.
Three out of four participants were randomly assigned to receive oxerutins (1,000 mg daily) while one out of four was given placebo. After 4 weeks of treatment, those who took oxerutins reported less heaviness, aching, cramps, and "restless leg" or "pins and needles" symptoms than those who took placebo. According to the researchers' calculations, oxerutins had produced significantly better results than placebo. This report has been criticized, however, for omitting key information (such as whether or not any participants also wore support stockings) and for failing to present data in a usable form.
A more recent, better-designed study supported these positive findings.
This 12-week, double-blind, placebo-controlled study enrolled 133 women with moderate chronic venous insufficiency. Half received 1,000 mg oxerutins daily, and the rest took a matching placebo. All participants were also fitted with standard compression stockings and wore them for the duration of the study. The researchers measured subjective symptoms, such as aches and pains, as well as objective measures of edema in the leg.
Those who took oxerutins had significantly less lower-leg edema than the placebo group. Furthermore, these results lasted through a 6-week follow-up period, even though participants were no longer taking oxerutins. Compression stockings, on the other hand, produced no lasting benefit after participants stopped wearing them. They gave symptomatic relief while they were worn, but they didn't improve capillary circulation in a lasting way, as oxerutins apparently did.
Regarding aching, sensations of heaviness, and other uncomfortable symptoms, however, there was little difference between the two groups. The authors theorized that the compression stockings gave both groups so much symptomatic relief that it was difficult to demonstrate a separate subjective benefit of oxerutin therapy.
Many other double-blind, placebo-controlled studies have also found benefits with oxerutins for varicose veins and venous insufficiency.
As mentioned above, there is some evidence that troxerutin—one of the compounds in the standardized mixture sold as oxerutins—may be effective when taken alone. One study found it more effective than placebo,
but another (very small) study found it less effective than the standard oxerutin mixture.
Pregnant women are at especially high risk for varicose veins and venous insufficiency. A 1975 study examined 69 pregnant women with varicose leg veins, and found that oxerutins (900 mg daily) were significantly more effective than placebo against pain as well as swelling.
A more recent study also found positive results,
but because it was neither placebo-controlled nor double-blind its results mean little (other than to suggest that oxerutins are safe in pregnancy).
Skin ulcers sometimes form on the legs of people with varicose veins or venous insufficiency, when capillary circulation has become too impaired to keep the skin healthy. A French study published in 1987 found that oxerutins combined with compression stockings were significantly more helpful for leg ulcers than the stockings alone.
Other positive results have been reported as well.
However, some experiments found oxerutins to have no benefit in treating or preventing leg ulcers.
Until more research is done, the most we can say is that oxerutins
be helpful for leg ulcers—especially if combined with compression stockings.
Women who have undergone
may experience a lasting and troublesome side effect: swelling in the arm caused by damage to the lymph system. Along with the veins, the lymph system is responsible for returning fluid to the heart, but when the system is damaged, fluid can accumulate. Three double-blind, placebo-controlled studies enrolling more than 100 people have examined the effectiveness of oxerutins in this condition.
In one trial, oxerutins worked significantly better than placebo at reducing swelling, discomfort, immobility, and other measures of lymphedema over a 6-month treatment period, with better results appearing each month
—suggesting that, for women with this condition, the full effect of oxerutins might take months to realize.
Two smaller studies also found oxerutins to be more effective than placebo, but the researchers were not sure that the improvement was large enough to make a real difference.
In all of these studies, the dosage used was 3 g daily—about 3 times the typical dosage for venous insufficiency.