No black box warning on record for N-15
As of the latest FDA labeling reviewed, N-15 (ECHINACEA ANGUSTIFOLIA, BAPTISIA TINCTORIA, POTASSIUM CHLORIDE, CALCIUM SULFIDE, FERROUS IODIDE, SULFUR IODIDE, AND BOS TAURUS THYMUS) does not carry a black box warning. Standard warnings and precautions still apply — see the full N-15 medicine page for the complete safety profile.