- Halcinonide
- Halfenprox
- Halobetasol
- Halofantrine
- Halofuginone
- Halometasone
- Haloperidol
- Haloperidol Decanoat...
- Halostachine
- Haloxyfop
- Harpagoside
- Hederacoside C
- Hederin
- Heliannone
- Heliotrine
- Hemanthamine
- Hemustine
- Heneicosanol
- Heparin
- Heptacarboxyporphyri...
- Heptachlorodibenzofu...
- Heptadecanoic Acid
- Heptenal
- Hericenone
- Heroin
- Hesperetin
- Hesperidin
- Hexacarboxyporphyrin
- Hexachlorodibenzofur...
- Hexachlorodibenzo-p-...
- Hexacosanoic Acid
- Hexadecane
- Hexamidine
- Hexarelin
- Hexenal
- Hexetidine
- Hexital
- Hexoprenaline
- Hexylresorcinol
- Hippuric Acid
- Histamine
- Histapyrrodin
- Histidine
- Homarine
- Homatropine
- Homatropine Hydrobro...
- Homoeriodictyol
- Homopterocarpin
- Homosalate
- Homovanillic Acid
- Hordenine
- Hydralazine
- Hydrazine
- Hydrochlorothiazide
- Hydrocodone
- Hydrocortisol
- Hydrocortisone
- Hydrocyanic Acid
- Hydroflumethiazide
- Hydromorphone
- Hydroquinone
- Hydroxocobalamin
- Hydroxocobalamin Ace...
- Hydroxyanisole
- Hydroxychloroquine
- Hydroxymethyl
- Hydroxyzine
- Hymecromone
- Hyocinolone
- Hyoscine Butylbromid...
- Hyoscine Hydrobromid...
- Hyoscyamine
- Hypolaetin
- Hypophyllanthin