- Halfenprox
- Halobetasol
- Halofantrine
- Halofuginone
- Halometasone
- Haloperidol
- Haloperidol Decanoat...
- Halostachine
- Halosulfuron
- Haloxyfop
- Haloxyfop-r-methyl
- Halquinol
- Harmane
- Harmine
- Harpagoside
- Hederacoside C
- Hederin
- Heliannone
- Heliotrine
- Hematoporphyrin
- Hemustine
- Heneicosanol
- Heparin
- Heptachlorodibenzofu...
- Heptadecanoic Acid
- Heptenal
- Hericenone
- Heroin
- Hesperetin
- Hesperidin
- Hexachlorocyclohexan...
- Hexachlorodibenzofur...
- Hexachlorodibenzo-p-...
- Hexadecadienol
- Hexadecanal
- Hexadecanoylamino
- Hexamidine
- Hexamidine Diisethio...
- Hexarelin
- Hexenal
- Hexetidine
- Hexoprenaline
- Hexylresorcinol
- Higenamine
- Hippuric Acid
- Histamine
- Histapyrrodin
- Histidine
- Homarine
- Homatropine
- Homatropine Hydrobro...
- Homopiperazine
- Homopterocarpin
- Homosalate
- Homovanillic Acid
- Honokiol
- Hopantenate
- Hordenine
- Huangcaoling
- Huperzine A
- Hycosamide
- Hydantoin
- Hydralazine
- Hydralazine Hydrochl...
- Hydrazine
- Hydrochlorothiazide
- Hydrocodone
- Hydrocortisol
- Hydrocortisone
- Hydrocyanic Acid
- Hydrogenobyrinic Aci...
- Hydromorphone
- Hydroquinone
- Hydroxocobalamin
- Hydroxocobalamin Ace...
- Hydroxychloroquine
- Hydroxychloroquine S...
- Hydroxyethyl Starch
- Hydroxyindole
- Hydroxyphenyl
- Hydroxypivalic Acid
- Hydroxyprogesterone
- Hydroxypyrene
- Hydroxyzine
- Hymecromone
- Hyoscine
- Hyoscine Butylbromid...
- Hyoscine Hydrobromid...
- Hyoscyamine
- Hyperforin
- Hypericin
- Hypochlorous Acid
- Hypolaetin
- Hypophyllanthin
- Hypoxanthine
- Hypromellose