I received a cal, the second time, from this number. They called themselves Pharmacia or something like that and alleged that I had previously filled a prescription for hydrocodone from them. They wanted to refill it and began asking for my credit card info. The call was coming from a "boiler room." The woman spoke with a heavy foreign accent.

I have in the past had a prescription for hydrocodone, but had only filled it with my local Walgreens. Only Walgreens, my prescribing physician and my insurance company know/knew that I have had this prescription. I am not sure what agency to report this to. Clearly it is a scam.

Got a call from these guys. I have no idea where the got my number but left a voicemail about how they could serve my pharmaceutical needs.  Telemarketer.

I get calls on my cell phone all the time and they will not leave a message. I am sick and tired of these calls. Any ideas how to get them to stop?

That operation appears to be Chris Smith AKA; Rizler. (google is your friend)
He is currently locked up in federal Max security for threatening the life of a witness in his "online pharmacy" scam.

Apparently the operation is continuing to run despite the indictments.

I got the same call only 1 time 10 minutes ago and it was the same story for
me than ChrisB.
it was verry hard to understand de woman,a lot of noises behind her voice and a bad foereign accent to.
I have asked if anybody speak french(i am from Québec in Canada) and she
of course answered NO.
We had a lot of problem to understanding each other and then she hung up
in my face.

It doesn't look like a company because if you call back,there is non recorded message,this woman answer to the phone,very bizzard!