This is only one of two Christian sites I found with a balanced view of this god-created herb, the other being Christians for Cannabis. Neither sees much traffic. There are more Christian naturists out there.
I think cannabis, used responsibly, like a little wine, is good for the soul. But I think it would be easier to convince my pastor that it's okay to be naked than stoned.
I found, by the way, one other site that does as good a job explaining the Greek meanings of pharmakeia: http://www.ilovephilosophy.com/vi...
There's a lot of info in the comments. Worth reading them all. As you stated, it meant using poisons or the services of one who mixed potions (drugs) to kill. They were thinking assassination in the comments (common in Roman times!), but I expect abortion was the most common use of pharmakeia.
I'd also recommend this booK Paul Among the People:
The author is a scholar of Greek, with a wider understanding of Greek and Roman literature, common writings, and Greco-Roman culture in general than is often found in Biblical Scholars. She brings a very refreshing take on some topics that are often associated with Paul and that have gotten him branded a misogynist (among other things).