Take the name of a small creature. Write it out twice, with 8 spaces in between. Then anagram the plural form of another small creature, along with another letter, and put it in those 8 spaces. The result will be a 14-letter word for a kind of pharmaceutical. What is it?

Take a four letter term for a part of the body. The first and last letters are the same. Advance the first letter 1 spot in the alphabet, and the last letter by 2 spots, and you'll get another term for the same body part. Which 2 words