I explained this in another post. I am taking narcotics, and the LDN blocks the receptors that the narcotics I take sit in. Just like in high dose naltraxone, it is used as a rapid detox for heroin addicts, and such, the same receptors are blocked or at least tied up by the low dose. So, I CAN take the LDN, but it would mean that I would have to cycle off my narcotics, and since I have found blessed, overwhelming, life changing relief from the current stuff I am on, I am not willing to switch over to something different to get on the LDN. So, I am not qualified to take it as long as I am on the stuff I am on.

hope that clears it up.