I have a small blue pill with the letter R on one side and the other side is split into two's by a line and under the line it has a 180. Can you please tell me what it is?

Please refer to this announcemet: https://www.askmehelpdesk.com/medications/announcement-b-font-color-red-font-size-3-important-concerning-identification-unknown-pills-font-font-b.html

Go to the library and look in a "PDR" Physicians Desk Reference.