Why Supplements Must Stop Before Surgery

Surgical teams ask about supplements for specific reasons, and the answers people give are frequently incomplete.

Bleeding risk

Several common supplements affect platelet function or coagulation: ginkgo, garlic, ginger, high-dose fish oil, high-dose vitamin E, turmeric and pine bark extract among them. The concern is intraoperative and postoperative bleeding, compounding with any anticoagulant or antiplatelet already prescribed. This is the most frequently cited category and the most commonly overlooked by patients.

Anaesthetic and cardiovascular interactions

Kava and valerian may potentiate sedative agents. St. John's Wort induces enzymes metabolising several anaesthetic and analgesic drugs and has been associated with cardiovascular instability in case reports. Stimulants affect blood pressure and rhythm. Huperzine-A, as a cholinesterase inhibitor, is relevant to neuromuscular blocking agents used in anaesthesia — a specific and underappreciated interaction. Anything affecting blood glucose matters, since anaesthesia masks hypoglycaemia symptoms.

The standard advice

Stop supplements roughly two weeks before elective surgery unless advised otherwise, allowing enzyme induction to reverse and platelet function to normalise. Tell the surgical team and anaesthetist everything you take, including things you consider trivial. Do not stop prescribed medication on your own initiative. Bring the actual bottles or label photographs rather than trying to recall names.

Cognicept in context

Nothing on this page is a claim about Cognicept specifically. Cognicept is a dietary supplement providing nutritional support for memory and focus; it is not a treatment for memory loss, dementia, anxiety or cognitive decline. Persistent or worsening memory symptoms warrant medical assessment, because several causes are checkable and correctable. For an honest read on the money, our value for money review states both sides.