My wife has been using the Exelon Patch for 18 months which was covered by Humana Rx (but still costs us $223 per month out of pocket). Just received notice that Exelon will no longer be covered for 2019 plan year. The notice says Covered Possible Alternative includes rivastigmine transdermal 24 hour patch but says nothing about which patch from any specific pharma company may be covered. I called Humana and of course customer service people know less than nothing. The are some articles on the internet re generic patch from Alvogen and Sandoz. Is anyone having similar experience? Thanks.