Those who travel a lot know that many antiparasitic drugs are much more cheaper in Asia and other third world countries. Drugs like Nitazoxanide, Pyrantel Embonate, Albendazole and Mebendazole can be found for a fraction of the price compared to USA. But in some popular places like Chiang Mai(Thailand) or Goa(India) there are alternative options available too such as diatomaceus earth and Miracle-Mineral-Supplement . Even ozone generator can be found in some shops for ozonating water.
And Spooky2 is useful for eradicating parasites as it can run genome based BP frequencies.
Here is an informative article especially for those in need of help on their travels: