Final answer:
Ketamine is the hallucinogenic drug that was originally developed as an intravenous anesthetic, while LSD is a hallucinogen but was not developed for anesthetic purposes.
Step-by-step explanation:
The correct answer to the question is Ketamine, which was originally developed as an intravenous anesthetic and is also a form of a hallucinogenic drug. LSD is indeed a potent hallucinogen and causes alterations in mood and perception, but it was not originally developed as an anesthetic. Instead, Ketamine, known by street names such as K, Special K, or cat Valium, fits the description of a hallucinogen initially intended for use as an anesthetic.