The commercial name is Avloclor. It's an anti-malarial treatment, available from pharmacists. I'm not sure of the pharmacy laws in the US, but in the UK it needs to be prescribed, however we can order it from online pharmacies with the justification of planning a little trip to Honduras in a few weeks... (Note: Chloroquine is not being prescribed as much as it used to be, due to chloroquine resistant strains of malaria. Make sure you specify Honduras as your holiday destination, otherwise they may prescribe something else). PS: Do NOT order chloroquine on ebay or from china in bulk. God knows what the purity etc is on that stuff and I've heard of mortalities with people using CP sourced that way.