Yes,I think it's ok to up the dose, some of us, as of Dr. Ian Zagon (one of the sci. researchers in Phd. dr. Jill Smiths team) is recommending to try what suits you the best. You could always reduce the dose, if you'll find no help. Anyway, you may be very well with 4.5 mg LDN as well, you have only used it since 05 this year, and it may need more time to kick in, and this fact could be the reason why it doesn't help you with all the symptoms. IMHO, I would up it, if I find the answer to my question by doing so, - well, then I'll go on by using a higer dose. You could always try different doses, all the way from 1.0 to 10.0 mg. Go slowly, and increase it gradually untill your symptoms are calmed down. Good luck!