Medications and Supplements to Stop Before Cosmetic Surgery: A Complete Timeline

1 hour ago
5 min read

Most clinics ask patients to pause certain medications and supplements before cosmetic surgery because several common substances increase bleeding, interact with anaesthesia, or impair wound healing — and the majority of them are bought without a prescription.

This is the pre-operative instruction international patients most often get wrong, because the list arrives late, arrives in translation, or omits the supplements people do not think of as drugs. What follows is a general framework for understanding why each category matters and roughly when clinics typically ask for it to stop. It is not a substitute for the specific written instructions from your own surgeon and anaesthetist, who know your history — and nothing here should be used to stop a prescribed medication on your own.

Why This Matters More Than Patients Expect

Three separate risks are in play. Bleeding: anything that impairs platelet function or clotting increases intraoperative bleeding, which lengthens surgery, and increases the risk of haematoma afterward — a genuine concern in facelift, rhinoplasty and body contouring. Anaesthetic interaction: some substances alter sedation depth, blood pressure or cardiac rhythm under general anaesthesia. Healing: a smaller group affects tissue oxygenation, immune response or collagen formation.

Clinics do not always explain which risk applies to which item, which is why instructions can feel arbitrary. Knowing the category makes it far easier to remember and to ask sensible questions.

Blood Thinners and Antiplatelet Medication

Prescription anticoagulants and antiplatelet drugs — warfarin, direct oral anticoagulants, clopidogrel, and low-dose aspirin taken for cardiac protection — carry the highest bleeding relevance and the highest risk if mishandled.

Never stop these on your own. They are prescribed to prevent stroke, clots or cardiac events, and stopping without supervision can be considerably more dangerous than the surgery. The decision to pause, bridge with an alternative, or proceed without stopping belongs to the prescribing physician in consultation with the surgical team. If you take any of these, you should disclose it at your first consultation, not at pre-admission, because it may change the timing or the venue of your procedure.

Over-the-Counter Painkillers

Aspirin and NSAIDs such as ibuprofen, naproxen and diclofenac inhibit platelet function. Aspirin's effect lasts for the lifetime of the affected platelets, which is why clinics typically request a longer pause for aspirin than for shorter-acting NSAIDs. Many surgical teams ask for aspirin to be stopped roughly one to two weeks in advance and other NSAIDs several days in advance, though protocols vary between clinics and by procedure.

Paracetamol (acetaminophen) does not have the same antiplatelet effect and is commonly the analgesic clinics permit in the pre-operative window. Confirm this with your own clinic rather than assuming, particularly if you have liver disease or drink alcohol regularly.

Herbal Supplements: the Category Patients Forget

Anaesthetists have flagged a recurring group of herbal products for bleeding or anaesthetic interaction. A commonly cited grouping includes garlic, ginger, ginkgo, ginseng and vitamin E, alongside fish oil and omega-3, turmeric and curcumin, feverfew, dong quai and St John's wort.

The mechanisms differ. Ginkgo and high-dose fish oil are associated with impaired platelet aggregation. St John's wort induces liver enzymes that metabolise several anaesthetic and analgesic drugs, potentially altering their effect. Ginseng has been associated with variable effects on blood glucose and blood pressure. Because supplement potency is inconsistent and interactions are not well quantified, many clinics ask for all non-essential supplements to be stopped roughly one to two weeks beforehand as a blanket precaution.

Report supplements by name and dose on your medical form. Patients frequently declare none while taking a daily multivitamin, a fish oil capsule and a herbal sleep aid — all three of which belong on the form.

Hormonal Medication and Clot Risk

Combined oral contraceptives and some hormone replacement regimens are associated with an increased risk of venous thromboembolism, which is relevant for longer procedures and for patients travelling by long-haul flight before or after surgery. Some surgeons ask for these to be paused before major body procedures; others do not, and stopping contraception has obvious separate consequences that need planning.

This is a discussion to have explicitly, alongside your flight schedule. Long flights and recent surgery are both independent clot risk factors, which is why clinics increasingly ask about travel dates as part of the medical assessment.

Smoking, Nicotine and Alcohol

Nicotine causes vasoconstriction, reducing blood flow to healing tissue. It is strongly associated in the surgical literature with wound-healing complications, skin flap compromise and higher infection rates, and the risk applies to vaping, patches and gum as well as cigarettes — the vasoconstriction comes from nicotine itself, not only from smoke. Many surgeons request cessation for several weeks before and after surgery, and some will decline to perform higher-risk flap procedures on active smokers.

Alcohol is generally stopped for a shorter window because it affects clotting, liver metabolism of anaesthetic drugs and post-operative swelling. Heavy regular drinkers should disclose this honestly, as withdrawal during an inpatient stay is a genuine clinical risk that the team needs to anticipate.

What You Should Never Stop Without Advice

Do not unilaterally pause: anticoagulants and antiplatelet drugs; medication for epilepsy, diabetes, thyroid disease, asthma, cardiac conditions or hypertension; immunosuppressants; or psychiatric medication. Abrupt discontinuation of several of these carries risks that clearly exceed the bleeding benefit.

The correct process is to send your complete medication list to the clinic well before travelling — ideally at the point of booking, not the week of surgery — and to have the surgical team coordinate with your own physician. For international patients this coordination takes time, which is the practical argument for disclosing early. Our 15-point clinic vetting checklist includes how to assess whether a clinic handles this properly.

Building Your Own Pre-Operative Checklist

Four steps. One: write down everything you ingest regularly — prescriptions, over-the-counter medicines, vitamins, herbal products, protein and pre-workout powders, and traditional remedies — with doses. Two: send it to the clinic at booking and ask for written, item-by-item instructions rather than a generic leaflet. Three: ask which analgesic you may use in the pre-operative window, since headaches do not pause for surgery. Four: confirm when each item may be restarted afterward, which is as commonly omitted as it is important.

Keep the written instructions with your travel documents. If anything changes between booking and departure — a new prescription, a new supplement — tell the clinic before you fly.

Frequently Asked Questions

Is it safe to take paracetamol before surgery?

It is commonly permitted because it does not carry the antiplatelet effect of aspirin and NSAIDs, but confirm with your own clinic, especially if you have liver disease.

Do I really need to stop fish oil?

Many clinics request it because of the reported effect on platelet aggregation at higher doses. The evidence on clinically significant bleeding is mixed, but clinics generally take the cautious position.

How long before surgery should I stop smoking?

Requests vary, commonly ranging from two to six weeks before and a similar period afterward. Longer is generally considered better for wound healing.

Can I take my usual blood pressure medication on the morning of surgery?

Frequently yes, with a sip of water, but some classes are held on the day. This must be specified by your anaesthetist, not assumed.

What if I forgot to stop something?

Tell the clinic immediately rather than concealing it. Depending on the item and timing they may proceed, adjust, or reschedule — but only if they know.

Sources and Further Reading

This article is general information and not medical advice. Individual suitability can only be assessed by a licensed physician in person. For institutional and peer-reviewed background see KHIDI (Korea Health Industry Development Institute), the Korean Society of Plastic and Reconstructive Surgeons, and PubMed.

Preparing for Surgery in Korea?

Send your full medication and supplement list to the clinic at the moment you book, not the week you fly — coordination across borders takes longer than patients expect. If you would like help shortlisting board-certified clinics and arranging English-language coordination, contact our team through the site.