How Long Do You Need Blood Thinners After Stentless (Drug-Coated Balloon) Angioplasty?

Author: Dr. Manas Parikh, Interventional Cardiologist, Apollo CVHF, Ahmedabad

Medically reviewed by: Dr. Sameer Dani, Chief Interventional Cardiologist, Apollo CVHF, Ahmedabad

Published: 27 October 2026

Last medically reviewed: 27 October 2026

If you’ve just had drug-coated balloon angioplasty, you’re probably wondering: if there’s no stent, why am I still on blood thinners, and for how long?

Here’s the short answer. Most people take two antiplatelet medicines together for anywhere from about a month to a year. If your procedure was planned and your heart disease is stable, you’ll usually be at the shorter end. If you were treated during a heart attack, expect the longer end. After that, most people stay on one antiplatelet medicine for the long term. Your discharge summary tells you exactly what your cardiologist has planned for you.

First, what is a drug-coated balloon?

A drug-coated balloon (DCB) is a balloon with medicine on its surface. Your cardiologist guides it through a thin tube to the narrowed part of your heart artery and inflates it. That opens up the artery and presses the medicine into its wall, where it helps stop the narrowing from coming back. Then the balloon comes out and nothing stays behind, which is why you’ll often hear it called stentless angioplasty.

DCBs suit some problems particularly well, such as an old stent that has narrowed again (in-stent restenosis), blockages in small arteries, and some new blockages that open up nicely once they’ve been prepared. Plenty of blockages still do better with a stent. Your cardiologist makes the final call during the procedure, once they can see how your artery responds. You can read more on our DCB angioplasty and stentless PCI page.

Dr. Sameer Dani, Chief Interventional Cardiologist at Apollo CVHF, was the first author of the published 12-month results from the NANOLUTE Registry. This multicentre Indian study gave some of the first clinical data on a sirolimus-coated balloon. Here’s how he puts it: “At Apollo CVHF, our experience with drug-coated balloons has been shaped by both research and clinical practice. Having been involved in the early evaluation of this technology in India, I believe its value lies not simply in avoiding a permanent stent, but in selecting the right patient, preparing the artery properly and following the evidence. We aim to practise in line with established guidelines and current evidence, while individualising treatment for each patient. A drug-coated balloon is an important option, not a replacement for a stent in every case.”

The medicines you go home with are chosen the same way.

Why do I need blood thinners if there’s no stent?

Because the artery still needs time to heal. Angioplasty stretches the artery and roughens its inner lining a little. Until that lining heals, platelets, the tiny blood cells that start clots, can clump on it. Antiplatelet medicines stop platelets from sticking so easily, which lowers the chance of a clot.

The good news is that the course is often shorter than after a stent. A stent is metal that stays in your artery, and until the artery’s own lining grows over it, a clot can form on it. Doctors call this stent thrombosis. With a balloon, there’s no metal left for a clot to form on, so that risk doesn’t apply. The treated spot still has to heal, though, and after a heart attack the chance of clots elsewhere in the heart arteries stays higher for a while. That’s why the reason for your procedure matters as much as the device.

A quick note on the words. “Blood thinner” usually covers two different kinds of medicine. Antiplatelets, like aspirin, clopidogrel, ticagrelor and prasugrel, are the ones you take after angioplasty. Anticoagulants, like warfarin or apixaban, are used for other problems such as atrial fibrillation. Some people need both, and because that combination raises the risk of bleeding, their plan is worked out separately.

Most people take aspirin plus one other antiplatelet for a while after the procedure. Doctors call this dual antiplatelet therapy, or DAPT.

So how long will I be on two medicines?

That depends mostly on why you had the procedure. Research on this question in DCB patients is newer than the research for stents, so cardiologists look at both.

If your procedure was planned and your heart disease is stable, an international expert group on DCBs suggests about four weeks of two medicines after a balloon-only procedure for a new blockage. European guidelines for planned angioplasty in general start at six months, and allow less for people at higher risk of bleeding. Your cardiologist will weigh up both.

If you were treated for a heart attack or unstable angina, European and American guidelines both start at 12 months of two medicines, and both allow a shorter plan for some people. American guidelines recommend switching to ticagrelor on its own after at least a month in suitable patients. European guidelines are more cautious and consider one medicine after three to six months.

So far, only one randomised trial has compared durations after DCB treatment. Called REC-CAGEFREE II, it followed 1,948 people in China who were treated with balloons alone for a heart attack or unstable angina. Half took aspirin and ticagrelor for a month, then ticagrelor alone for five months, then aspirin. The other half stayed on both medicines for 12 months. A year later, a serious problem (death, heart attack, stroke, another procedure or major bleeding) had happened to 87 of 975 people on the shorter plan and 84 of 973 on the longer one. Serious bleeding was less common on the shorter plan, at about 4 in every 1,000 people compared with about 17 in every 1,000. That’s encouraging, but it was a single trial in carefully selected patients using one type of balloon. It supports a shorter plan for some people, and your cardiologist decides whether you’re one of them.

If you’re at higher risk of bleeding, for example because you’ve bled seriously before or you have anaemia or kidney disease, your cardiologist may shorten the two-medicine period after weighing bleeding against the risk of another heart problem.

If you also got a stent, which sometimes happens alongside a balloon or as a backup during the procedure, your plan will follow the guidance for stents as well.

Your discharge summary lists every medicine and how long to take it. If something isn’t clear, ask your treating team before you change anything.

What your cardiologist looks at

Can I stop the second medicine after a month?

Only if your cardiologist has told you to. A month is right for some people after a planned DCB procedure, but not for everyone. And feeling well doesn’t mean the artery has finished healing.

Will I be on an antiplatelet for life?

Most likely, yes. Once the two-medicine period is over, most people with coronary artery disease stay on one antiplatelet for the long term. Usually that’s aspirin, though some people take clopidogrel instead, for example if aspirin doesn’t suit them. If you’re also on an anticoagulant, your plan may look different: aspirin is often stopped early, and one antiplatelet carries on alongside the anticoagulant for a set time. Ask your cardiologist which medicine to stay on and for how long.

Day-to-day tips while you’re on these medicines

• Take them every day as prescribed. If you miss a dose, check with your care team rather than doubling up.
• Tell every doctor and dentist you see that you’ve had angioplasty and take antiplatelets.
• Ask your doctor or pharmacist before taking a painkiller. Ibuprofen and diclofenac can raise your bleeding risk.
• If you need surgery or a tooth taken out, don’t stop your medicines on your own. Your cardiologist and the other doctor should agree on a plan well ahead of time.
• A bit of easy bruising is normal. New, heavier or long-lasting bleeding is worth a call to your doctor.
• Keep your follow-up visits, as your plan may change while you recover.

When to get help straight away

Call Apollo CVHF’s 24-hour emergency line on +91 7096 800 800, or your nearest emergency service, if you have:

• chest pain or pressure that’s new or getting worse
• sudden or severe breathlessness, or you faint or collapse
• vomiting blood, black tarry stools, heavy bleeding or bleeding that won’t stop
• a head injury while on antiplatelets or anticoagulants

Don’t drive yourself to hospital, and don’t wait to see if it passes. Skipping or changing your medicines won’t fix any of these.

Looking after your heart beyond the medicines

Antiplatelets are one part of protecting your heart. Keeping your cholesterol down, controlling blood pressure and diabetes, staying active as you recover, eating well and keeping away from tobacco all help your arteries over time.

DCB angioplasty at Apollo CVHF, Ahmedabad

Our interventional cardiology team offers DCB angioplasty to the patients it suits, along with angioplasty with stents and complex coronary angioplasty. Which procedure you have, and which medicines follow it, is decided for you individually, based on your symptoms, your arteries, how the procedure went and your risk of clots and bleeding.

If you have questions about your medicines after angioplasty, or you’d like someone to look over your reports, get in touch with us in Bodakdev, Ahmedabad.

Medical disclaimer: This article is for general education and does not replace personal medical advice. The type, combination and duration of antiplatelet or anticoagulant medicines after angioplasty must be decided by your treating cardiologist. Seek emergency care for suspected heart attack symptoms or serious bleeding.

References

1. Dani S, Shah D, Sojitra P, Parikh K, Shetty R, di Palma G, Cortese B. A novel nanocarrier sirolimus-coated balloon for coronary interventions: 12-month data from the Nanoluté Registry. Cardiovascular Revascularization Medicine. 2019;20(3):235–240. PubMed
2. Jeger RV, Eccleshall S, Ahmad WA, et al. Drug-coated balloons for coronary artery disease: third report of the International DCB Consensus Group. JACC: Cardiovascular Interventions. 2020. ACC summary
3. Gao C, et al; REC-CAGEFREE II Investigators. Stepwise dual antiplatelet therapy de-escalation in patients after drug coated balloon angioplasty (REC-CAGEFREE II): multicentre, randomised, open label, assessor blind, non-inferiority trial. BMJ. 2025;388:e082945. Read the trial
4. 2024 ESC Guidelines for the management of chronic coronary syndromes. European Heart Journal. 2024;45(36):3415. Read the guideline
5. 2023 ESC Guidelines for the management of acute coronary syndromes. European Heart Journal. 2023;44(38):3720. Read the guideline
6. American Heart Association. Top Things to Know: 2025 ACC/AHA/ACEP/NAEMSP/SCAI Guideline for the Management of Patients With Acute Coronary Syndromes. Read the summary