Well... nicotine is an alkaloid, so I think e-juice would then get that classification when nic is added to it. Drug or no drug, though, it's neither here nor there (IMO).
What I find curious is adding two (indole) alkaloids. And to be honest, those are two I had never even heard of. Harmane and norharmane? Had to get my Google-fu on. But don't worry, I won't start posting Pubmed abstracts. lol
The fact that this is from NJOY just made it that much more strange. I think they may be trying to compete with Nic Salt and the JUUL.