I presume this is a question.
Medicines (as in western medicine) are not built unless they are created in a chemistry laboratory.
Herbal medicines are extracted, usually from more than one plant species and various methods are used, dependent upon what the medicine is to be used for.
The methods are tincture (herbs are soaked in alcohol to extract the components), decoction (herbs are boiled for various amounts of time but usually at least 5 hours to extract the components),
for extraction of herb components the usual solvents are;
water, mineral oil or olive oil, alcohol (vodka is normally the choice).
Essential oil (the herbs are distilled thus releasing the volatile oils which contain the components)
Redhawk