Explore the 4 common categories of cold medicines, and how to choose the right one based on your symptoms.

From incantations in ancient Egypt, bloodletting in 18th century Europe, to President Coolidge inhaling poisonous chlorine gas in 1924, the common cold has inspired a variety of creative treatments. Today pharmacies are filled with an endless assortment of cold remedies. But how do these products work? And are they effective? Explore the most common categories of cold medicines and their purposes.

Directed by Lippy.