This skill is almost impossible to learn.
The skill is automatically in use.
In large communities there are often those who focus on healing arts and curing diseases. They may be religious persons, clerics and such, who use god-given powers to heal the wounded. They can also be practitioners of medicine, who use their knowledge of anatomy and physiology to their customers' benefit. With this skill, you can create several medicines by using 'create medicine' spell. When you have this skill at average, you will be able to create 'placeloft', an anti-allergic medicine that requires capsules of Thunbergia plant. At 'very good+' you will be able to create a more efficient anti-allergic medicine called 'placemax' if you have Hawthorn fruits.