End of day medicine

I suppose others are similar to me , i am on stalevo 150mg 6 times a day, depending when i get up and when i go to bed, I tend to find that my final stalevo has no or little effect sometimes or takes a lot longer.. I feel that at that time i could do with a stronger dose say one tablet of 175mg. Does anyone do that already or is it a no no. If i was just off to bed then it;s no big deal , but if not it gets uncomfortable. I am usually ok during the day so long as i keep the timing right.