Habu (snake, Trimeresurus Flav)
Haematoxylon
Haemolytic Staph Aureus (Staph Haem)
Haemolytic Strep (Strept Haem)
Haemophilus Influenza
Hafnium Oxide
Hair Applications (mixed)
Hair Dye (mixed)
Hairgrass (Antarctic, Deschampsia Antarctica) 
Haliaeetus Leuc (American Bald Eagle)
Halocynthia Roretzi (Sea pineapple)
Halogen Light
Ham
Hamamelis Virginica
Hamster Hair
Haplopappus Bay
Hare (Lepus Europaeus)
Hare (Lepus Saxatilis)
Haronga Madagasc
Harpagophytum (Devil's Claw)
Harris Hawk (Parabuteo Unicinctus, Hawk Harris)
Harrogate Spa Water
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
Heather (mixed Scottish)
Hedeoma Pulegioides
Hedera Helix
Hedgehog (Erinaceus Europus)
Hekla Lava
Helianthus Annuus
Helicobacter Pylori
Helimincothorten
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 
Hemachatus Haem (Rinkhals, Spitting Cobra)
Hematite
Hemidactylus Frenatus (Gecko)
Henna (Lawsonia Intermis)
Hepar Sulph (Calcareum)
Hepar Sulph Kalinus
Hepatic (Liver) Cancer Aspirate
Hepatica Tril
Heracleum Sphond (Branca Ursina)
Hermit Crab (Coenobita Clypeatus)
Heron, Great Blue (Ardea Herodias, Great Blue Heron)
Heron, Grey (Ardea Cinerea, Grey Heron)
Herpes Simplex
Herpes Zoster
Herring, atlantic (Clupea harengus)
Heteractis Malu (Sea Anemone, Hawaiian)
Hevea Brasiliensis (Rubber Tree)
Hexachlorocyclohexane (HCH)
Hieracium Pilosella
Hip
Hip, Arthritic (see OAN)
Hippocampus kuda (Common Seahorse)
Hippocampus mohnikei (Japanese Seahorse)
Hippomanes
Hippophae Rhamnoides (Buckthorn, Sea buckthorn)
Hippopotamus (tail hair)
Hippozaeninum (Mallein)
Hippuricum Acid (Acid Hippuricum)
Hirudo Verbana (Sanguisuga)
Hirundo Rustica (Swallow)
Histamine (Histaminum)
Histidine
Hoang Nan
Hogweeds (mixed)
Holarrhena Ant (Kurchi)
Holmium Brom
Holmium Carb
Holmium Met
Holmium Mur
Holmium Nit
Holmium Oxydatum
Holmium Phos
Holmium Sulph
Homarus Amer (Lobster)
Honey (Mel)
Hoover Dust
Hordeum Vulg (Barley)
Hornbeam (Carpinus Betula)
Hornbeam, American (Ostrya Virg)
Hornbill (Buceros Bicornis)
Horned Viper (Cerastes Cerastes)
Hornet (Vespa Crab)
Horse Hair
Horse Nosodes - specialist use only
Horse Serum
Horse Vaccines - specialist use only
Horsefly
House Dust
House Dust Mites (HDM)
House Dust Mites, Individual (see Dermatophagoides)
House Fly (Musca Domestica)
House spider (Tegenaria Domestica)
Human Dander
Human Dandruff
Human Hair
Human Nosodes - specialist use only
Human Papilloma Virus
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
Hydrophobinum (Lyssin)
Hydrophyllum Virgin
Hyena, saliva/hair (Parahyaena brunnea)
Hyoscyamus Niger
Hypericum Perf
Hypericum/Calendula
Hypophysine (Pituitary Gland whole)
Hypophysine Ant (Pituitary Gland Anterior)
Hypophysine Post (Pituitary Gland posterior)
Hypothalamus
Hyssopus
Hystrix Prehensilis (Sphingurus Martini, Sphiggurus spinosus, Porcupine)