I'm sorry you're having trouble getting meds, I dealt with the same thing :( I suggest you start off with Pyrantel Poamate liquid, like I did from Amazon, or E-Bay. IMO, it is the same med as Pin-ex, easier to take, but I think it's stronger. Easy directions are right on the bottle.
If you need something stronger, go to a local Farm store, or Pet store, for animal meds, they're basically the same thing as human meds, even cheaper. Next get yourself some Permaguard Diatemaceous earth D.E.
Finally get yourself a good Zapper!
All this good info is available here, just search.