WE have magic mouth wash in the states too. The one my oncologist made up himself, has 3 narcotics in it, but it just doesn't last long after you eat, Supposed to take 2 teaspoons before meals. swish, gargle and then swallow it. Same at bedtime. At bedtime it will last longer unless you try to eat. Belinda ,m I had one thing done to me that most don't and that is radiation seed implants put into my tongue by going up thru my chin in the OR then quaranteening me for at least 3 days, This ended up to be 7 days and one step from being put in a home to wait for me to die,. LOLNo way will I leave this earth that easy. I was put into an induced coma for the 3 days. As you can see, there is no set procedure they follow.