I take 200mg daily. I have permission from my GP to go up and down as I see fit. When I go to the dentist for example I up the dose a few days in advance. I believe my TN and dental treatments are inked so am still having dental work. ( and will be for the next month or so) I have only been taking this for 6 weeks but it does seem to work for me. My main side effect is tiredness. The pain is sooooo much better now but I am loathe (scared actually) to stop it incase the severe ligtning pains come back. Best of luck.