Drug Interactions Directory
46 drugs starting with H.
2,618Drugs
67,117Interactions
53,805Serious (major+)
PharmacistReviewed
1Look up a drugSearch by generic or brand name, or browse A-Z.
2Scan the severityInteractions are grouped and color-coded by how much they matter.
3Read the write-upPlain-English and clinical explanations, with cited evidence.
Sources: FDA prescribing information (Structured Product Labeling), the published literature cited in each entry, DDInter 2.0 (a major open-access drug-interaction database), and legacy DrugBank interaction data distributed by the NIH's RxNav service (decommissioned in 2024) — analyzed and reviewed by our pharmacist team. How we build this library →
H
Haemophilus B Vaccine
11
Halazepam
22
Halcinonide
6
Halcinonide Topical
29
Halobetasol
5
Halobetasol Topical
21
Halofantrine
59
Haloperidol
126
Halothane
38
Hawthorn
9
Helicobacter Pylori Breath Test
1
Hemin
4
Heparin
221
Heparin Injection
193
Hepatitis A Vaccine, Inactivated
11
Hepatitis B Vaccine
2
Heptabarbital
2
Hetacillin
6
Hexafluorenium
12
Hexaminolevulinate
6
Hexobarbital
23
Histrelin
62
Histrelin Implant
211
Hiv Screening
1
Homatropine
12
Horse Chestnut
4
Horsetail
2
Human Papillomavirus Vaccine
2
Hyaluronidase
1
Hydralazine
12
Hydrastis
3
Hydrochlorothiazide
89
Hydrocodone
56
Hydrocortisone
439
Hydrocortisone Injection
393
Hydroflumethiazide
66
Hydromorphone
43
Hydromorphone Injection
344
Hydromorphone Rectal
344
Hydroquinidine
51
Hydroxyamphetamine
15
Hydroxychloroquine
631
Hydroxytryptophan
18
Hydroxyurea
28
Hydroxyzine
87
Hyoscyamine
12