try looking up nepenthes too!

[Alteration of nepenthes.]
[nepenthes] 1. A drug of Egyptian origin mentioned in the Odyssey as capable of banishing grief or trouble from the mind; hence, any drug or potion having, or conceived as having, the same power; also, occas. the plant or herb supposed to yield the drug.


and here, especially for dr. bill, is quinion:
http://www.quinion.com/words/weirdwords/ww-nep1.htm