Thrombocid in Spain: What the Ointment Is For and Who Should Avoid It

Thrombocid is an ointment sold in Spanish pharmacies for bruises from knocks and for heavy, tight legs with varicose veins. It contains pentosan polysulfate sodium (pentosano polisulfato sódico), a heparin-like substance. It is not an anti-inflammatory. This guide is by Dr. Pedro Yelamo Vera, an English-speaking GP licensed in Spain (Colegiado No. 484814280) who sees patients by video in English and Spanish.

What is Thrombocid used for?

Thrombocid is used on the skin to ease the symptoms of two problems. The Spanish product information lists:

• bruises near the surface caused by knocks, in adults and children over 1 year;
• surface vein problems, such as heavy, tight legs with varicose veins, in adults.

It eases symptoms. It does not make varicose veins go away or treat their cause. It is also not a substitute for having a bad injury checked.

Is Thrombocid an anti-inflammatory?

No. The product information places it with the vein protectors, in the group of heparins and heparinoids used on the skin. It does not describe an anti-inflammatory effect. What it describes is this:

• it helps stop small clots forming and helps them clear;
• it improves blood flow in the tiny vessels of the skin;
• it helps a bruise fade faster.

Its blood-thinning effect is much weaker than heparin's and barely matters on the skin. If you want to ease the pain and swelling of a knock, anti-inflammatory medicines such as ibuprofen are a different group, with their own safety rules.

What is the difference between Thrombocid and Thrombocid Forte?

Both have the same active ingredient and the same uses. Thrombocid Forte is stronger: 5 mg per gram of ointment instead of 1 mg. The number is the strength of the ointment. It is not advice on how much to use. The leaflet explains how to apply it.

Do you need a prescription for Thrombocid in Spain?

No. You can buy it in a Spanish pharmacy without a prescription. It is still a medicine, so read the leaflet and ask the pharmacist if you are unsure. The leaflet says to see a doctor if it gets worse or is no better after 5 days. Our guide to which medicines need a prescription in Spain covers other common products.

Who should not use Thrombocid?

• Anyone allergic to pentosan polysulfate sodium or to anything else in the ointment.
• People with bleeding or a serious clotting disorder.
• Babies under 1 year, as it has not been studied in them.
• Never put it on the inside of the mouth or nose, on ulcers, or on open or infected wounds.

What care is needed when using it?

• Use it only on unbroken skin and keep it away from the eyes.
• With a vein problem caused by a clot, it is put on gently, without rubbing. But a possible clot needs a doctor first.
• Do not use it for a long time or on very large areas of skin.
• It contains cetostearyl alcohol, propylene glycol and parabens, which can irritate the skin or cause an allergy.

Can I use Thrombocid when pregnant or breastfeeding?

There is little data. The product information does not advise it in pregnancy, and says a doctor should decide during breastfeeding. Ask before you use it.

What are the side effects?

Side effects are very rare. The only one listed is a skin allergy. If you notice redness, itching or irritation, stop using it and get advice.

In English: what is the equivalent?

The active ingredient is pentosan polysulfate sodium. It is not usually sold in the UK or the US as a skin ointment. UK pharmacies sell other heparinoid creams for bruises, such as Hirudoid, which contains a different heparinoid. In the US, pentosan polysulfate is known as Elmiron, a capsule for bladder pain. That is a different medicine for a different problem, so do not mix them up. In Spain, ask the pharmacist for Thrombocid or Thrombocid Forte.

When to see a doctor

• You bruise without a knock, or very easily.
• You take a blood thinner and get a large bruise.
• The bruise is very painful, keeps growing, or is no better after 5 days.
• One leg is swollen, red, warm and painful. This can be a blood clot.

When to call 112

• Sudden shortness of breath or chest pain, especially with a swollen leg.
• A blow to the head followed by drowsiness, vomiting or confusion.
• Bleeding that will not stop.

Frequently asked questions about Thrombocid

Getting a medical assessment

If you bruise easily, or have heavy or swollen legs and want advice, you can book a video consultation with Dr. Pedro Yelamo Vera, a physician registered in Spain. You can also read about swollen ankles and varicose veins. A prescription is never guaranteed: it is issued only where clinically appropriate after a genuine evaluation, as a private electronic prescription under Spanish law. This service is for urgent, non-emergency care. In an emergency, call 112.

This guide is general information. It does not replace the package leaflet or the advice of your doctor or pharmacist.