No black box warning on record for N-18
As of the latest FDA labeling reviewed, N-18 (OYSTER SHELL CALCIUM CARBONATE, CRUDE, SEPIA OFFICINALIS JUICE, SILICON DIOXIDE, NITRIC ACID, AND SUS SCROFA PINEAL GLAND) does not carry a black box warning. Standard warnings and precautions still apply — see the full N-18 medicine page for the complete safety profile.