Medicine

Medicine allows you to treat serious injury and do long term care. People dying of plagues and broken bones fall under this while first aid covers flesh wounds. This also likely covers drugs to help with things. There is likely a bit of cross over in the use of medicine and first aid, but in general first aid is likely used in emergencies while medicine assumes you have time to work.

Medicine

Sedivore: The Untittled epicspire Fuzzy_alchemist