Prescription medications--availability

My wife and I will be moving to Cuenca in mid-to-late October and would like to know if there is a way we can check on the availability of prescription medications?

We are also curious about difficulties, if any, we may encounter bringing our medications into Ecuador. We both plan to have 90-day supplies with us and will have written copies of all prescriptions from our physician.

Thanks for you assistance, in advance...

I was hoping to hear something like that...thanks!