Which medications and supplements raise bruising risk before injections?
Aspirin, other anti-inflammatory painkillers, prescribed blood thinners, alcohol and several supplements, including fish oil, high-dose vitamin E, ginkgo, garlic and St John's wort, are linked with more bruising after Botox or filler. The evidence is stronger for the medications than for the supplements, and published advice on how long before treatment to avoid them varies. A prescribed medication, above all a blood thinner, is never stopped for a cosmetic treatment without the prescriber who manages it.
Why medications matter before an injection
Every injection passes a needle through skin that is full of small blood vessels. When one is nicked, blood leaks into the tissue and shows as a bruise. Anything that slows clotting or makes platelets less sticky lets more blood escape before the leak seals. Bruising is common even without those factors: one study of injectable fillers reported bruising in 19 to 24 percent of patients, and other reports put the rate as high as 68 percent (source, verified ). For neuromodulators, the Botox Cosmetic label lists bleeding and bruising among the reactions that may be associated with the injection (source, verified ).
So the question before a first visit is not only “what should I stop?” It is “what do I take, and who decides what happens to it?”
The rule that comes first
Never stop a prescribed medication for a cosmetic treatment without the clinician who prescribes it. This matters most for anticoagulants (such as warfarin, apixaban, rivaroxaban or dabigatran) and antiplatelet drugs (such as clopidogrel, or aspirin taken on a doctor’s advice). These are prescribed to prevent strokes, heart attacks and clots. A bruise is a temporary cosmetic problem; a clot is not.
The published guidance is consistent on this. A bruising consensus says warfarin, the direct oral anticoagulants, heparins and clopidogrel all increase the risk of bleeding and bruising, yet these medications should not be stopped without specialist advice and should not be discontinued for an aesthetic procedure (source, verified ). In another review, a 2013 review advises against discontinuing anticoagulants that are medically needed, noting that most dermatologic surgeons keep them going and make sure the patient understands the added bruising risk (source, verified ). And even the consensus that gives a stopping window adds a caution: an expert consensus on filler complications says anticoagulants, NSAIDs and supplements should be discontinued 7 to 10 days before treatment, but not without consultation with the treating physician, and that when anticoagulation is well balanced the risk of stopping it is greater (source, verified ).
An injector does not tell you to stop a prescribed drug, and neither does a website. Tanya practices under a delegating prescriber, and the decision about any medication you take belongs to the clinician who manages it. If a pause is ever considered, it is arranged with that clinician, not improvised before an appointment.
Over-the-counter painkillers
Aspirin taken for a headache, and the other non-steroidal anti-inflammatory drugs (NSAIDs) such as ibuprofen and naproxen, reduce platelet function. These are the medications the bruising literature names most often. The sources agree that they raise bruising risk and differ slightly on timing; both positions are set out in the Numbers box below.
“Taken for another purpose” and “not medically necessary” are the important words. Both sources in the box are talking about aspirin you chose to take for pain, not aspirin a doctor prescribed for your heart. If you are unsure which category yours falls into, ask the prescriber, and tell your injector either way. Filler labeling asks for the same disclosure: the patient labeling for one FDA-approved lip filler asks patients to tell their doctor about St John's wort, high-dose vitamin E, aspirin and other NSAIDs such as ibuprofen, because these may increase bruising or bleeding (source, verified ).
Supplements, and how strong the evidence is
Several common supplements are linked with bleeding. Between them, two bruising reviews name fish oil and omega-3 fatty acids, garlic, high-dose vitamin E, ginkgo and St John’s wort; their exact wording and timing are in the Numbers box below.
The evidence behind these warnings is thinner than the confident lists suggest. In a review of supplements and surgery, a 2015 review found that evidence on supplements and surgical bleeding comes mostly from laboratory and animal work, limited clinical studies and case reports; clinical trials did not find significant bleeding with fish oil, ten case reports implicated ginkgo in serious bleeding without trial evidence, the evidence for ginseng is weak, and St John's wort mainly reduced the effect of warfarin (source, verified ). Interactions are a separate concern from the supplement alone: ginkgo may increase the risk of bleeding in people who take anticoagulant drugs such as warfarin (source, verified ). That is why a supplement that seems harmless on its own still needs mentioning if you also take a prescribed blood thinner.
Supplements are not prescribed, but stopping one is still worth checking with whoever recommended it, especially if it was a doctor treating a condition.
Alcohol
Alcohol is not a medication, but it belongs on the same list. One bruising consensus links it with more bruising and gives a window before treatment, shown in the Numbers box below.
How far ahead? What the sources say
There is no single rule, and the sources do not agree on one. They describe different populations (some write about surgery, not injections) and different products. The figures below are what each source says, side by side.
Aspirin and NSAIDs not medically needed: aspirin taken for another purpose, such as pain relief, should be avoided for one week before treatment, and other NSAIDs such as ibuprofen and naproxen for a similar period (source, verified ); if aspirin is not medically necessary it should be held for one week before an injectable procedure, and other NSAIDs avoided for five days (source, verified ). Supplements: fish oil and omega-3 fatty acids, garlic, high-dose vitamin E, ginkgo biloba and St John's wort may all lead to greater bruising, and the consensus advises avoiding them for two weeks before surgical procedures (source, verified ); high-dose vitamin E, ginkgo and garlic have case reports and studies showing increased bleeding, and many physicians recommend stopping them two weeks before a procedure (source, verified ); the same review reports general advice to stop herbal medicines about two weeks before surgery, with public education materials advising at least two to three weeks (source, verified ). Alcohol: alcohol increases the risk of bruising, and the consensus advises avoiding it for 24 hours before treatment (source, verified ). After filler: the same labeling asks patients to avoid aspirin, NSAIDs, St John's wort, blood thinners and high-dose vitamin E for one week after treatment (source, verified ).
Read the ranges as the window in which these substances are thought to matter, not as instructions. None of them applies to a prescribed drug, which stays with its prescriber. The after-treatment instruction in the filler labeling mentions blood thinners too; for a prescribed blood thinner, that is again a question for the prescriber, not a reason to stop. The practice treating you will give its own written instructions before your visit.
What to tell your injector, and why the exam asks
Bring a complete list: prescription medications with doses, over-the-counter painkillers you take regularly or took this week, vitamins, fish oil, herbal products, and how much alcohol you usually drink. Mention any bleeding or clotting problem, and whether you bruise easily. Product labels ask for the same: the Botox medication guide asks patients to tell their doctor about bleeding problems and about all medicines, including prescription and over-the-counter medicines, vitamins and herbal supplements (source, verified ).
This is part of the Good Faith Exam. New patients have this examination by a licensed practitioner before a first treatment, and the medication review is where the practitioner weighs your bruising risk, any interaction, and whether treatment should go ahead now or later. Nothing on this page, and nothing in a booking call, replaces that review. Whether you are treated, and when, is decided after the consultation.
Other things that matter before a visit
- An infection or rash where you would be treated. Botox Cosmetic is contraindicated when there is infection at the proposed injection sites (source, verified ). For filler, filler treatment where skin sores, pimples, rashes, hives, cysts or infections are present should be postponed until healing is complete (source, verified ).
- Feeling unwell, or a recent vaccine. a guideline written by founders of the Complications in Medical Aesthetics Collaborative says treatment should not be carried out in a patient with an intercurrent illness or local skin inflammation, and that vaccinations, including influenza and shingles, might trigger delayed inflammatory reactions (source, verified ). Mention a cold, flu or recent vaccination when you book.
- Cold sores, for lip treatment. A history of cold sores matters even when none is active. One expert consensus says patients with a history of herpes should be prescribed antiviral medication before treatment, and injections should be delayed until active lesions have completely resolved (source, verified ). An antiviral is a prescription, so it comes from the prescriber, not the injector. Lip filler swelling and when to call covers what happens afterward.
- Pregnancy or breastfeeding. For Botox Cosmetic, there are no studies or adequate data on the developmental risk of Botox Cosmetic in pregnancy, and no data on whether it passes into breast milk (source, verified ). For one lip filler, the safety and effectiveness of that lip filler have not been established in people who are pregnant or breastfeeding (source, verified ). Elective treatment is usually deferred, and the conversation belongs at the consultation.
- Dental work, for filler. A guideline on delayed filler reactions advises that dental treatment, including cleaning, should be followed by an interval of at least four weeks before filler injection, and dental treatment after filler should be delayed by three to four weeks if possible (source, verified ). Mention recent or planned dental appointments.
- An event coming up. A bruise takes time to fade (see below), so treatment is best planned well ahead of a wedding, photographs or travel, not in the days just before.
What normal bruising looks like, and when to call
A normal bruise is a flat patch of discolored skin that changes color as it fades. It is tender to press but not painful on its own, and it gets better day by day. bruising will usually resolve in healthy individuals within 10 to 14 days (source, verified ). Filler labeling uses a similar window: most side effects such as bruising and swelling usually go away within one to two weeks, and an injection-site reaction that persists beyond 14 days should be reported (source, verified ).
Call the same day if the skin over or around a treated area turns white or a dusky, mottled gray-purple, or if pain is severe, getting worse, or felt away from where the needle went in. Those are not bruising, and after filler they can be signs of a blocked vessel. Call within office hours about a bruise that is spreading or still present after two weeks, a firm swelling under it, or any bruising far beyond what you were told to expect, especially if you take a blood thinner.
Sources
- The Management of Bruising following Nonsurgical Cosmetic Treatment , Journal of Clinical and Aesthetic Dermatology, via PubMed Central Clinical guideline Accessed
- Minimizing Bruising Following Fillers and Other Cosmetic Injectables , Journal of Clinical and Aesthetic Dermatology, via PubMed Central Peer-reviewed Accessed
- Treatment of Soft Tissue Filler Complications: Expert Consensus Recommendations , Aesthetic Plastic Surgery, via PubMed Central Clinical guideline Accessed
- Commonly Used Dietary Supplements on Coagulation Function during Surgery , Medicines (Basel), via PubMed Central Peer-reviewed Accessed
- Ginkgo: Usefulness and Safety , National Center for Complementary and Integrative Health, National Institutes of Health Accessed
- BOTOX Cosmetic (onabotulinumtoxinA) for injection, Prescribing Information (revised 10/2024) , AbbVie Manufacturer Accessed
- About Restylane Kysse (FDA-approved patient labeling, P140029/S021) , U.S. Food and Drug Administration Regulator Accessed
- Delayed-onset Nodules (DONs) and Considering their Treatment following use of Hyaluronic Acid (HA) Fillers , Journal of Clinical and Aesthetic Dermatology, via PubMed Central Clinical guideline Accessed
Questions readers ask
My doctor has me on a daily low-dose aspirin. Should I skip it before my appointment?
No, not on your own. Aspirin taken to protect the heart or prevent clots is a prescribed treatment, and only the clinician who prescribed it can decide whether a pause is safe. Keep taking it, tell your injector, and expect the plan to work around it rather than the other way round.
I took ibuprofen yesterday and forgot. Do I need to cancel?
Tell your injector before treatment rather than cancelling on your own. The usual effect is a somewhat higher chance of bruising, and whether to go ahead or move the appointment is a decision made at the visit, with the reason explained to you.
Do I need to stop my multivitamin?
The sources reviewed here name specific supplements, such as high-dose vitamin E, fish oil, ginkgo, garlic and St John's wort, not an ordinary multivitamin. Bring the bottle or a photo of the label to the consultation so the actual doses can be checked.
Can I take arnica to prevent bruising?
One expert consensus on filler complications lists arnica with vitamin K creams as a preventive option for bruising. It does not replace telling your injector what you take, and any product you plan to use, applied or swallowed, is worth mentioning at the consultation.
Is a bruise a sign that something went wrong?
Usually not. A needle passing near a small vessel can leave a bruise even with careful technique, and bruising is one of the most common reactions after injections. What matters is how it looks and how it changes, which is described in the section on when to call.
Revision history (1)
- update First version, written from peer-reviewed literature and society guidance Editorial team