| Oak |
| Oat Straw |
| Oats |
| Ocimum Can |
| Ocimum Sanct |
| Octopus (Octopus Vulgaris) |
| Oenanthe Biennis |
| Oenanthe Crocata |
| Oenanthus |
| Oesophagus |
| Oestrone (Folliculinum) |
| Oil of Cade |
| Oil Seed Rape |
| Okoubaca Aub |
| Oleander (Nerium Oleander) |
| Oleum Animalis Æthereum |
| Oleum Cajuputi (Cajuputi) |
| Oleum Jecoris Aselli |
| Oleum Olivae |
| Olive |
| Olive Ridley Sea Turtle (Lepidochelys Oliveacea) |
| Oncorynchus (Sock-eye salmon) |
| Oniscus Aselli |
| Onopordon Acanthium |
| Onosmodium Virgin |
| Oopherinum (Ovary) |
| Operculinum Turpethum (Ipomoea Turpethum) |
| Opthalmic Artery |
| Optic Nerve |
| Opuntia Vulgaris |
| Or Natif |
| Orange |
| Orange Peel |
| Orange Yellow (Sunset Yellow, E110) |
| Orchitinum (Testes) |
| Oreodaphne Californica |
| Organic Phos |
| Origanum Maj (Origanum Vulg) |
| Ornithogalum Umbell |
| Orotic acid (Acid oroticum) |
| Orthophenylphenol (E231) |
| Oscillococcinum (Anas Barb Co) |
| Osmium Met |
| Osmium Mur |
| Osteo-arthritis Nosode (OAN) |
| Osteo-arthritis Nosode Knee |
| Osteo-arthritis Nosode Hip |
| Osteocynesine |
| Ostrya Virg |
| Ova Testae |
| Ovarium (Ovarian Gland) |
| Ovary (Oopherinum) |
| Ovi Gallinae Pellicula |
| Ovine Nosodes - specialist use only |
| Ovivac |
| Owl (Bubo Virginianus, Great Horned) |
| Owl (Tyto Alba, Barn) |
| Oxalicum Acid (Acid Oxalicum) |
| Oxalis Acetosella |
| Oxydendron Arbor |
| Oxygen |
| Oxytocin |
| Oxytropis Lambertii |
| Oxyuranus Microlepidotus (Inland Taipan snake) |
| Oxyuranus Scutellatus (Papuan Taipan snake) |
| Oxyures Verm |
| Ozonium (Ozone) |
|
| Paeonia Off |
| Pagodroma Nivea (Snow Petrel) |
| Palagonite |
| Palladium Met |
| Pan troglodytes (Chimpanzee hair) |
| Panax Ginseng (American, Ginseng quinquefolium) |
| Panthera Onca (Jaguar) |
| Panthera Pardus (Leopard) |
| Panthera Tigris (Tiger) |
| Panthera Uncia (Snow Leopard) |
| Pantothenic Acid(Acid Pantothenic,Vitamin B5) |
| Paraffinum |
| Parathyroid Gland |
| Pareira Brav |
| Pariera Brom |
| Paris Quadrifolia |
| Parotid Gland |
| Parthenium Hyst |
| Passiflora Inc |
| Pastinaca Sat |
| Pawpaw (Asimina Triloba) |
| Peach |
| Peanut |
| Pearl (Immersion) |
| Pearlwort (Antarctic, Colobanthus Quitensis) |
| Pectens Jacobaeus (Scallop) |
| Pediculus Capitis |
| Pel Cavae Cobaiae (Golden Hamster) |
| Pel Muris (Mouse fur) |
| Pelican (Pelecanus Occidentalis) |
| Pelvis (right) |
| Penicillium Notatum (mould) |
| Penguin (Adelie, Pygoscelis Adeliae) |
| Penguin (Chinstrap, Pygoscelis Antarctica) |
| Penguin (Gentoo, Pygoscelis Papua) |
| Penguin Guano (mixed) |
| Penguin (Humboldt, Sphenicus Humboldti) |
| Penthorum Sediodes |
| Pepper Plant |
| Pepsinum |
| Peregrine Falcon (Falco Peregrinus) |
| Perfume (mixed) |
| Pergonal |
| Perhexiline (Pexid, PXD) |
| Peridot |
| Perna Can (Green Lipped Mussel) |
| Pernettya Mucronata (Gaultheria Mucronata) |
| Petiveria Tetranda |
| Petrel (Snow, Pagodroma Nivea) |
| Petrel (Southern Giant, Macronectes Giganteus) |
| Petrol |
| Petrol and Diesel Fumes |
| Petroleum |
| Petroselinum Sat (Carum Carv) |
| Peumus Boldus (Boldo) |
| Pexid (Perhexiline, PXD) |
|
| Pharynx |
| Phaseolus |
| Pheasant Dust |
|