The Kitzur Shulchan Aruch was written in the 1800s, based on the Shulchan Aruch, which was written in the 1500s. This chapter discusses the medical treatments of the times, some of which may now be discredited. Here, we only address the permissibility of those treatments on Shabbos, not their medical effectiveness. Please consult your own rabbi regarding matters of medical treatment on Shabbos. In case of serious illness or injury, seek medical attention!
91:7 If a person has cut his hand or foot, he may soak it in wine in order to stop the bleeding. He may not use vinegar (or whiskey – Mishnah Brurah 328:92) because it is strong and like a remedy. If the person is sensitive, then wine is like vinegar to him and likewise prohibited. If the wound is on the back of his hand or the back of his foot, or if it was caused by something metal, he may treat it with anything, as we will see in 92:5.
91:8 If a person is having discomfort in his eyes, he should not put saliva directly from his mouth on them, since this is obviously being done for medical purposes. One who cannot open his eyes may apply saliva directly because this isn’t medicinal, it’s to enable him to open his eyes properly.