Following my first psychotic break I was taking a total of 30 mg/day (15 in morning, 15 at bedtime), but yeah definitely talk to your doctor. I could barely drag myself out of bed at such a high dose.
I am on 25mg. 10 in morning 15 at night. I have noticed it works better than 20 mg. Coffee is necessary. I hope I don’t have to go higher. I definitely don’t want to go over 30mg.