- Gabapentin
- Gabazolamine-05
- Gabitril
- Gadavist
- Gallium Citrate Ga 67
- Galzin
- Gantrisin
- Gantrisin Pediatric
- Garamycin
- Garamycin (Ophthalmic Route)
- Garamycin (Topical)
- Gastrocrom
- Gattex
- GaviLyte-N with Flavor Pack
- Gazyva
- Gelnique
- Gemzar
- Gen-Xene
- Gengraf
- Gentamicin (Otic Route)
- Genteal
- Gentian Violet (Topical Route)
- Gentian Violet (Vaginal Route)
- Genvoya
- Geodon
- Gianvi
- Gilotrif
- Glauctabs
- Gleevec
- Gliadel
- Glipizide and Metformin
- GlucaGen
- Glucosamine
- Glucotrol
- Glucovance
- Glyset
- Gralise
- Granix
- Grastek
- Guanidine
- Guiatuss
- Gynazole-1
- Gyne Cure