I read this on an answer of a question:

Customers of Signature Pharmacy, as exclusively reported in the New York Daily News:

-Adam Copeland (Edge)
-King Booker (Robert Huffman)
-Shane Helms
-Mike Bucci
-Anthony Carelli (Santino Marella)
-John Hennigan (John Morrison)
-Darren Matthews (William Regal)
-Ken Anderson (Ken Kennedy)
-Chavo Guerrero
-Randy Orton
-Charlie Haas

Eddie Guerrero and Chris Benoit were also on the list of WWE-contract customers.

Officials say numerous names of NFL and MLB pro athletes will also emerge.

The specific drugs being prescribed are not identified in the New York Daily News article.

ESPN.com has published a list of wrestlers who were customers of the pharmacy, and included the same names plus these three:

-Shoichi Funaki
-Dave Bautista (Batista)
-Chris Mordetsky (Chris Masters)