It is NOT available -but after looking for opiates for months- (aside from Tramadol, which is not OTC either but is somewhat easy to get, plus Carisoprodol, which is really easy to get) I got some pharms that can sell me "Tylenol 4" (60mg 300mg APAP per pill) in a box of 10 or 20 capsules. The price US i$ 12 for small box and 24 for the large. Add Carisoprodol which is easy to get, a bunch of benzos, which are easy to get (any benzo, pharms doesn't know the difference between Diazepam, Alprazolam or Flunitrazepam), some Naproxen, some Diphenhydramine, a little Alcohol, and there you go
Also, Coke and Cannabis are REALLY easy to get from streets, but I don't like Cannabis and the comedown of Coke just doesn't worth it for me. Specially when you can buy (on a "small friendly pharm" Modafinil =P).
Aside from that, LSD is pretty common, but regular quality. Good ones worth like 25 the blotter. And next you could have access to Ketamine (which is kinda cheap compared to other drugs) and MDMA (also cheap but I dont buy much of it cos I dont like it), always if you look around very well for it.
Myself, I found Hydrocodone, but in 5mg per capsule so I have to buy the whole box, 55, for a unique trip [obviously its always an awesome nod but those 55 really hurts).
I tried to find an Oxycodone dealer for a whole year -it was worth it

-; but beware, the price of this drugs is REALLY expensive, like $270 dollars for 9 pills of 40mg Oxy.
Basically, anything except good Coke, Cannabis, and cheap LSD, is very expensive here.
Too bad im a downer's and psychodelic guy