- Gabapentin
- Gabarone
- Gabitril
- Gablofen
- Gadobenic Acid
- Gadobutrol
- Gadodiamide
- Gadofosveset
- Gadopentetic Acid
- Gadoterate
- Gadoteridol
- Gadoversetamide
- Gadoxetic Acid
- Galactose
- Galafold
- Galantamine
- Galcanezumab-gnlm
- Gallamine
- Gallimycin
- gallium (67Ga) citrate
- Gallopamil
- Galsulfase
- Galzin
- Gamifant
- Gammagard
- Gamolenic Acid
- Gamolenic Acid, Combinations
- Gamunex-C
- Ganciclovir
- Ganidin NR
- Ganirelix
- Gantanol
- Gantrisin Ophthalmic
- Gantrisin Pediatric
- Garamycin
- Gardasil
- Gardasil 9
- Garenoxacin
- Gas-gangrene Sera
- Gas-X
- Gas-X with Maalox
- Gastrocrom
- GastroMARK
- Gatifloxacin
- Gattex
- Gaviltye-G
- GaviLyte-C
- GaviLyte-N
- Gaviscon
- Gaviscon-2
- Gavreto
- Gazyva