Is the blood of a fox unlawful, even if it is a medicine for treating asthma?

All flowing blood is forbidden and impure, and it is not permissible to use it for medicinal purposes or any other use, whether it is from a fox or anything else, due to the Almighty's saying: "Forbidden to you are carrion, and blood, and the flesh of swine." Allah has not placed the cure for the Ummah in what He has forbidden to it. As for the blood remaining in the flesh, bones, and veins of an animal slaughtered according to Islamic law, there is no objection to treating with it, based on its purity and the permissibility of the fox.