Drug Interactions Directory

2,618 drugs with documented interactions.

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.
Popular: Buprenorphine 633 Hydroxychloroquine 631 Ketoconazole Topical 546 Cyclosporine Injection 545 Cyclosporine Ophthalmic 545 Sertraline 532 Amitriptyline 525 Fentanyl Transdermal Patch 493

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 →

F
Fosphenytoin Sodium 2 Fospropofol 21 Fostamatinib 75 Fostemsavir 240 Framycetin 11 Frangula 1 Frovatriptan 21 Fruquintinib 2 Fulvestrant 21 Fulvestrant Injection 20 Furazolidone 13 Furosemide 105 Furosemide Injection 241 Fusidic Acid 3 Futibatinib 72
G
Gabapentin 27 Gabapentin Enacarbil 26 Galantamine 180 Gallamine 16 Gallium Ga 68 Dotatate 38 Gallium Ga 68 Dotatoc 3 Ganaxolone 30 Ganciclovir 17 Ganciclovir Injection 16 Ganciclovir Ophthalmic 16 Garlic 26 Gatifloxacin 89 Gatifloxacin Ophthalmic 283 Gefitinib 60 Gemcitabine 30 Gemcitabine Injection 27 Gemfibrozil 80 Gemifloxacin 327 Gemtuzumab Ozogamicin 4 Gemtuzumab Ozogamicin Injection 20 Gentamicin 19 Gentamicin Injection 75 Gentamicin Ophthalmic 75 Gentamicin Topical 75 Gepirone 77 Gepotidacin 95 Germanium 1 Gestodene 47 Gilteritinib 82 Ginger 20 Ginkgo 70 Ginseng 23 Ginseng, American 4 Ginseng, Chinese 5 Givinostat 76 Givosiran 2 Glasdegib 288 Glecaprevir 48 Gliclazide 8 Glimepiride 250 Glipizide 197 Gliquidone 6 Glucagon 24 Glucagon Injection 115 Glucagon Injection / Solution 115 Glucagon Nasal Powder 115 Glucarpidase 3 Glucomannan 7 Glucosamine 5 Glucose Measurement, Blood 1 Glyburide 79 Glycerin 2 Glycopyrrolate 21 Glycopyrronium Topical 97 Glycopyrronium Tosylate 18 Gold Sodium Thiomalate 7 Goldenseal 10 Golimumab 12 Golimumab Injection 32 Gonadorelin 18 Goserelin 62 Goserelin Implant 226 Gossypol 24 Granisetron 66 Granisetron Injection 281 Granisetron Transdermal Patch 281 Grapefruit Juice 3 Grazoprevir 28 Grepafloxacin 21 Griseofulvin 13 Guanabenz 3 Guanadrel 2 Guanethidine 5 Guanfacine 69 Guanidine 1 Guar Gum 13 Guarana 2 Guggul 16 Guselkumab 4 Guselkumab Injection 20 Gymnema Sylvestre 7
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