- Haemophilus influenza type B vaccine
- HandiHaler
- Heparin
- Hepatitis B vaccine
- Histaclear®
- Hormone replacement therapy
- HPV vaccine
- HRT
- Humira®
- Hybloc®
- Hydrocortisone (tablets)
- Hydrocortisone acetate (foam enema)
- Hydroxychloroquine
- Hygroton®
- Hyoscine hydrobromide
- Hypericum
- Hypericum perforatum
- Hytrin®