Bleeding can be stopped with a variety of things but some blood thinners can not be turned off.
Heparin is a commonly used blood thinner, it can be counteracted with a medication called protamine.
Colloidal silver can be used it burns like hell but can stop some smallish bleeding. The internet claims all sorts of other uses, do not believe them.
A person can be infused with whole blood or platelets to stop bleeding.
Some blood thinners can result in death.
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