In the middle ages, most common people received medical treatment from

Articular cartilage to shocks and prevents friction between parts.

Darren was recently ticketed for speeding over 110 mph on the freeway. when the police officer stopped darren and asked him why he was going so fast, he replied that he was "king of the world." the month before this, darren felt sad and listless and had trouble getting up the energy to go to school. he probably suffers from:

What is a risk associated with medicines?