Just as it does with food, the body tries to chemically break down medicines as soon as they enter the body. Most drugs taken by mouth enter the stomach or small intestine and then are sent to the liver. The liver contains protein molecules called enzymes that chemically modify drugs and other non-food substances.
Pluto: The Farthest Planet (Usually) Pluto, the ninth planet in our solar system, was not discovered until 1930 and remains a very difficult world to observe because it's so far away. At an average distance of 2.7 billion miles from the Earth, Pluto is a dim speck of light in even the largest of our telescopes. It takes almost 249 years to make one swing around the Sun, in a long looping orbit that takes it above and below the path of the other planets.
Neptune is so far away, it's impossible to see without a telescope. Because Pluto has such a weird orbit, Neptune is actually the furthest planet from the sun for 20 years out of every 248 Earth years. Pluto moved out of the way for Neptune at the end of the 20th century.