Thomas Jefferson University scientist Raymond Penn spends his days searching for the molecules that could be the key to better asthma treatments. He’s invested decades into this goal, for which stakes ...

DEAR DR. ROACH: My older friends and I talk about your column once in a while, and we all read it every day. Thank you. One thing we all wonder is, how do pills work? How does the medicine know where ...

This is the first in an occasional series on the origin of commonly used medicines. When epinephrine was first discovered at the turn of the 20th century, it was essentially a drug without a disease.

Dear D.A.: With a few exceptions, the medicine in the pills goes nearly everywhere in the body, but only “work” in specific locations. For example, if you take the blood pressure medicine atenolol, ...