- Halcinonide
- Halfenprox
- Halobetasol
- Halofantrine
- Halofuginone
- Halometasone
- Haloperidol
- Haloperidol Decanoat...
- Halostachine
- Haloxyfop
- Harpagoside
- Hederacoside
- Hederin
- Heliotrine
- Hemanthamine
- Hemustine
- Heparin
- Heptacarboxyporphyri...
- Heptadecanoic Acid
- Heptenal
- Heroin
- Hesperetin
- Hesperidin
- Hexacarboxyporphyrin
- Hexadecane
- Hexamidine
- Hexarelin
- Hexenal
- Hexetidine
- Hexital
- Hexylresorcinol
- Hippuric Acid
- Histamine
- Histapyrrodin
- Histidine
- Homarine
- Homatropine
- Homoeriodictyol
- Homovanillic Acid
- Hordenine
- Hydralazine
- Hydrochlorothiazide
- Hydrocortisol
- Hydrocortisone
- Hydroflumethiazide
- Hydromorphone
- Hydroquinone
- Hydroxocobalamin Ace...
- Hydroxyanisole
- Hydroxychloroquine
- Hydroxymethyl
- Hydroxyzine
- Hyocinolone
- Hyoscine Butylbromid...
- Hyoscine Hydrobromid...
- Hyoscyamine
- Hypophyllanthin