What is the name of the drug Blexten?

Excuse me, could you please clarify something for me? In the paragraph you mentioned, it speaks of a drug named Blexten. However, I'm a bit confused. Is Blexten an actual, existing drug that I may not be familiar with, or is it a fictional drug name used for illustrative purposes? If it's a real drug, could you perhaps provide some more context or information about its uses, side effects, or anything else that might be relevant? I'm just trying to get a better understanding of the topic at hand. Thank you.