Hi,
I take it nightly for a week or two until I feel I have a good sleep pattern established, then stop for a few weeks as it tends to dry out my sinuses too much if I take it all time. I think you can develope a tolerance to it also, which is another reason to take a break from it.
I cleared it with my PC and Onc before I started using it, and made sure it's in my chart in case there are any reactions or contraindications.
Hugs,
Lolly