We have some spectacular prices (like $1-$15 for drugs picked up at drug stores, generally, and $30 or $70 for 90-day supplies shipped to you from Express Scripts). Yes, the UFT recognizes it is super duper annoying to get the drugs shipped to you and they said they are working on it. But, even with that, they have kept costs down immensely. Also: sometimes you can get a last-minute override by calling the UFT Welfare Fund if you need to the drugs ASAP and can't wait for shipment.
There are some complications to keep in mind. While most drugs are paid for by the UFT Welfare Fund, there are a few that are paid from different cards that you are given. For example, "the city-administered PICA (Psychotropic, Injectable, Chemotherapy and Asthma) Drug Program" covers injectibles (including the EpiPen) and Chemo drugs (hence the name). And, by state law, diabetes drugs are covered by health insurance directly.
When in doubt, contact the UFT welfare fund for more information.