- Halcinonide
- Halobetasol
- Halofuginone
- Haloperidol
- Haloperidol
- Haloperidol Decanoate
- Harpagoside
- Hederacoside
- Heliotrine
- Heparin
- Heroine
- Hesperetin
- Hesperidin
- Hexamidine
- Hexetidine
- Hexoprenaline
- Hidiosmin
- Histamine
- Histidine
- Homatropine
- Homatropine Hydrobromide
- Hycosamide
- Hydralazine
- Hydrochlorothiazide
- Hydrocortisone
- Hydroflumethiazide
- Hydroquinone
- Hydroxocobalamin
- Hydroxocobalamin Acetate
- Hydroxychloroquine
- Hydroxyzine
- Hyoscine
- Hyoscine Butylbromide
- Hyoscine Hydrobromide
- Hyoscyamine
