Ordeal bean (Physostigma), [161]

Oregon grape root (Berberis), [40]

Orphol (Bismuthi betanaphtholas), [41]

Orris, [119]

root (Iris), [119]

Ovi albumen recens, [152]

vitellum recens, [152]

Ovum gallinaceum, [153]

Oxgall, [85]

extract, [85]