Based on my experience and research they are not affiliated. USpharmacyrx is run by "internet marketing group" in Miami. Tropicalrx's domain is registered in the dominican republic or someplace thereabouts I believe.

In terms of prices and drugs offered they are very different.

The CS reps are different and most importantly, they use different pharmacies to fill their scripts.

If USPharmacyrx were affiliated with Tropicalrx, their main generic hydro offering would be 10/500 Watson 540s from Clinical Solutions, not 10/325 Watson 853's from C&V and TDI.

The only connection I see is Dr. Ronald Lynch writes scripts for both pharmacies.