Habu (Snake, Trimeresurus Flav)
Haematopus Ostralegus (Oystercatcher)
Haematoxylon Campechianum
Haemolytic Staph Aureus (Staph Haem)
Haemolytic Strep (Strept Haem)
Haemophilus Influenza
Haemorrhus Mexicanus (House Finch)
Hafnium Oxide
Hair Applications (mixed)
Hair Dye (mixed)
Hairgrass (Antarctic, Deschampsia Antarctica) 
Haliaeetus Albicilla (White tailed Eagle)
Haliaeetus Leuc (American Bald Eagle)
Halocynthia Roretzi (Sea pineapple)
Haloragis Erecta
Halogen Light
Ham
Hamamelis Virginica
Hamster Hair
Handkea Ex (Lycoperdon Ex, Calvatia Excipul)
Handroanthus Imp (Tabebuja Impetiginosa)
Hapalochlaena Mac (Blue Ringed Octopus)
Haplopappus Bay
Hare (Lepus Europaeus)
Hare (Lepus Saxatilis)
Harebell (Campanula Rotundifolia, Bluebell)
Haronga Madagasc
Harpagophytum (Devil's Claw)
Harpia Harpyja (Harpy Eagle)
Harris Hawk (Parabuteo Unicinctus, Hawk Harris)
Harrogate Spa Water
Harvest Mite (Neotrombicula Autumnalis, Chigger)
Hawk, Harris (Parabuteo Unicinctus, Harris Hawk)
Hawk, Red Tailed (Buteo Jam Rapt, Red Tailed Hawk)
Hawksbill Sea Turtle (Eretmochelys imbricata)
Hawthorn Pollen
Hay Dust
HCD (House Dust/Cat/Dog)
Heart
Heath Spotted Orchid (Dactylorhiza Maculata)
Heather (mixed Scottish)
Hedeoma Pulegioides
Hedera Helix
Hedgehog (Erinaceus Europus)
Heimia Salicifolia
Hekla Lava
Helianthemum Numm (H. Vulg)
Helianthus Annuus
Helianthus Tuberosus (Jerusalem Artichoke)
Helimincothorten
Heliocopris Antenor
Heliotropium Peruvianum
Helium
Helix Aspera (Snail, garden)
Helix Pomatia (Snail, edible)
Helix Tosta (Snail, cooked)
Helleborus Foetidus
Helleborus Niger
Heloderma Horr (Beaded Lizard)
Heloderma Suspectum (Gila Monster)
Helodrilus Calig (Lumbricis Terr, Earthworm)
Helonias Dioica 
Helvella Lacunosa
Hemachatus Haem (Rinkhals, Spitting Cobra)
Hematite
Hemidactylus Frenatus (Gecko)
Henna (Lawsonia Intermis)
Hepar Bovis
Hepar Suis
Hepar Sulph (Calcareum)
Hepar Sulph Kalinus
Hepatic (Liver) Cancer Aspirate
Hepatica Triloba (Hepatica Nobilis)
Heptacodium Miconioides
Heracleum Mantegazzianum
Heracleum Sphond (Branca Ursina)
Herkimer Diamond
Hermannia Saccifera
Hermit Crab (Coenobita Clypeatus)
Hermit Crab (Pagurus Bernhardus)
Herniaria Glab
Heron, Great Blue (Ardea Herodias, Great Blue Heron)
Heron, Grey (Ardea Cinerea, Grey Heron)
Herring, atlantic (Clupea harengus)
Heteractis Malu (Sea Anemone, Hawaiian)
 
Hevea Brasiliensis (Rubber Tree)
Hibbertia Scandens
Hibiscus Rosa Sinensis
Hieracium Pilosella
Himantopus Himantopus (Stilt)
Hip
Hip, Arthritic (see OAN)
Hippocampus kuda (Common Seahorse)
Hippomanes
Hippophae Rhamnoides (Buckthorn, Sea buckthorn)
Hippopotamus (tail hair)
Hippozaeninum (Mallein)
Hippuricum Acid (Acid Hippuricum)
Hippuris Vulg
Hirudo Verbana (Sanguisuga)
Hirundo Rustica (Swallow)
Histamine (Histaminum)
Histidine
Hoang Nan (Strychnos Gaultheriana)
Hobby (Falco Subbuteo)
Hogweeds (mixed)
Hoitzia Coccinea (Loeselia)
Holarrhena Ant (Kurchi)
Holmium Brom
Holmium Carb
Holmium Iod
Holmium Met
Holmium Mur
Holmium Nit
Holmium Oxydatum
Holmium Phos
Holmium Sil
Holmium Sulph
Homarus Amer (Lobster)
Honey (Mel)
Hoodia Gordonii (Bushman's Hat)
Hoopoe (Upupa Epops)
Hoover Dust
Hordeum Vulg (Barley)
Hornbeam (Carpinus Betula)
Hornbeam, American (Ostrya Virg)
Hornbill (Buceros Bicornis)
Horned Viper (Cerastes Cerastes)
Hornet (Vespa Crab)
Horse (Wild, Equus Ferus Caballus)
Horse Hair
Horse Serum
Hottentotta Tamulus (Buthotus Tamulus)
Hottonia Palustris
House Dust
House Dust Mites (HDM)
House Dust Mites, Individual (see Dermatophagoides)
House Finch (Haemorrhus Mexicanus)
House Fly (Musca Domestica)
House spider (Tegenaria Domestica)
Human Dander
Human Dandruff
Human Hair
Humboldt Penguin (Sphenicus humboldti)
Hummingbird (Calypte Anna)
Humpback Whale (Megaptera Novaeangliae)
Humulus Lupulus (Lupulus)
Hura Bras (Hura Crepitans)
Hyaluronic Acid (Acid Hyaluronic)
Hydrangea Arbor
Hydrargyrum (Merc Viv)
Hydrargyrum Ammon (Merc Precaep Alb)
Hydrastinum Mur
Hydrastis Canadensis
Hydrobrom Acid (Acid Hydrobrom)
Hydrochloric Acid (Acid Mur, Muraticum Acid)
Hydrocotyle Asiatica (Centella)
Hydrocyanicum Acid (Acid Hydrocyanicum)
Hydrofluoric Acid (Acid Fluoricum, Fluoricum Acid)
Hydrogen
Hydrogen Peroxide
Hydrophis Cyan
Hydrophyllum Virgin
Hyena (Parahyaena Brunnea)
Hyoscyamus Niger
Hypericum Perf
Hypericum/Calendula
Hypothalamus
Hypoxis Hemerocallidea
Hyssopus
Hystrix Prehensilis (Sphingurus Martini, Sphiggurus spin, Porcupine)