When I first started LDN, I began at 3 mg.
The first 2 days were awesome! Probably placebo though or my body quickly built up a tolerance.
I've tried breaking up pills to make 4.5 mg doses (neuro won't write 4.5 mg for me) and noticed slight improvement the next day only.
I've even doubled up (6 mg) a few times and not really noticed anything, so I'm back to 3 mg for now...
Good Luck Jake!
If you can't explain it simply, you don't understand it well enough. - Al Einstein