Yes, these warnings are taken from the warnings for the High Dose Naltrexone and most likely will not be a problem with the LDN.

Cheryl is right, in as much as, mixing LDN with opiads will, likely do no harm, but may reduce the effectiveness of the opiad and perhaps the LDN, as well. I've taken both at the same time, because I forgot to quit taking the LDN while taking an opiad, and both worked just fine....but this was a temporary event, too.

The precautions are there and, like with any other med, the possibility of harm is always there, but, the likelyhood is very small, with LDN, IMHO..