There have been several news reports lately about drugs from Mexico. There is little government regulation for production, so you might end up with something that's the same as in the US or you might end up with something that doesn't work or is even harmful or deadly. In the past few years there has been an increase in demand for cheap Mexican drugs, so several pharmacutical companies in Mexico have started using cheap fillers in production. The news stories all had to do with the high content of lead poison in the medications (coming from the fillers used to "cut" the drugs). Many families interviewed had children with brain damage or even children who had died from taking lead laced drugs from Mexico.