I would not advise to simply quit after 50 mcg. You have to taper back down.
Also, it is not necessary to wait a whole week to bump up from 12.5 to 25, then another to 37.5 and then another to 50.
I would start with 12.5, then bump to 25 after 3-4 days, then to 37.5 after 3-4 days, then 50 after...