I jumped from 30 to 40, but I may be able to add to this discussion..Well, I hope
I didn't notice any adverse side effects, but I had been taking 30mg for about 7 years prior to the dosage increasing, so my body was well and truly used to them.
Only thing I did notice, was I was on a proper high for a couple of days, but it levels out and you kinda get used to the 40mg.
That's just my POV on things, I hope you find them useful
Danny