Warfarin should not be taken with some medications and herbal supplements, so always check with your doctor or pharmacist before starting any new medicines. This includes over-the-counter anti-inflammatories such as diclofenac (eg, Voltaren Rapid), ibuprofen (eg, Nurofen) and naproxen (eg, Naprogesic).
Some herbal or 'natural' products such as co-enzyme Q10, echinacea, fenugreek, fish oils, dong quai, ginkgo biloba, garlic, ginger, ginseng, glucosamine, kava kava, liquorice and St John’s Wort are known to have an effect on warfarin. Always check with your doctor or pharmacist before taking vitamins, herbal preparations or dietary supplements.
If you are already taking any of these when you are prescribed warfarin, tell your doctor or pharmacist.