Hi Nannan2 yes please check with GP re. Warfarin, Ive just had a look online and it's not very definitive. I wouldn't like it to harm you in any way. No problem about the questions, it's good to share the knowledge.
If you get the go-ahead to use it with warfarin the recipe is as follows -
Fresh ginger approx equivalent of 2 chunks, each about as big as your thumb - doesn't matter if a bit more or less - peeled and roughly chopped, 2 medium apples, any variety, again roughly chopped but don't include the cores, 2 tablespoons apple cider vinegar and 2 tablespoons of black Nigella Sativa seeds topped up with half pint of water and whizzed in a nutribullet or blender.
Take a large shot in the morning and again just after teatime. It's a bit of a brisk mixture and will make you go ooof! then oooh! if you're anything like me when the ginger kicks in
The seeds are also known as kalonji and are used quite a bit in Indian cooking and home made remedies. There is also oil made from them but personally I prefer the seeds. There may be some Nans of Indian heritage on here who can supply more ideas on their uses. They're available from most Asian food shops if you have one nearby or online from the usual (Amazon).
Even if the seeds are not suitable for you the rest of the mix is a good tonic in itself. Hope it does you some good.