Medical supplies are practical equipment: clean cloth, bandages, splints, washing water, salves, carrying slings and a field kit. Record what is available and what treatment it makes possible.
Possessing a supply does not automatically remove Fatigue, Strain, Wounds, Conditions or Wither. Use the established Health, recovery and Ability rules, with the WorldKeeper setting the time, tools and stakes of treatment.
A remedy may have a name, maker, cultural history or distinctive preparation without receiving a new numeric effect. Supernatural healing requires an established permission; an item name alone grants none.