Lucy, the key to this med is to NOT take too much. Doctors typically prescribe too much. Other replies mention vision and feeling stupid on it, that is true but i think its from taking a little too much, that was in my case. I have also taken gabapentin in the past and it did the same thing, made me not all there.
Marygrace mentioned she has a blog on LDN, Im going to read it…I have been on 1mg of it for about 6 months…it has worked wonders for my energy.