Tap the profile icon in the top right. Select 'Data Updates', here you will see the Application Version and the Drug Reference Version, as well as the last date that you updated your drug database.
To find Medscape and iOS version in one place:
Open the Medscape App. Tap on the profile icon in the top left. Select settings - help- report a problem, on this screen you will see your Apple iOS version, as well as your Medscape version.