25mg increments are done slowly, till a therapeutic dose has been astablished for you, cause keep in mind not everyone will respond the same to the same doses, sort of like "customized".

If you should develop any rashing, be sure to call the prescribing physician, usually there is minimal side effects when this medications (like many others) is titrated properly, as well as patient being checked by the doc, if anything does develop.
To anyone, I cannot stress enough to keep your doc updated on any negative changes, as well as the positives.
I was on 200mgs for a couple of years, now I'm down to 150mgs,which my pdoc said anything under that may and usually is no longer therapeutic. I did start at 25mgs and was gradually increased up to the 200mgs.
For me, I find it a pretty good med, but I am also in a better place (mentally,emotionally and family situations) so that may reflect why I am having so much success compared to when I had been first DXed in 2000.
Lots of luck with this, and keep the faith.