G
- G-130
- Gabapentin
- Gaboxadol
- Gacyclidine
- Galantamine
- Ganciclovir
- GBL
- Gendenafil
- Gentisic acid
- GHB
- GHRP-1
- GHRP-5
- GHRP-6
- Gidazepam
- Gitoxin
- Glafenine
- Glaucine
- Glibenclamide
- Glibornuride
- Gliclazide
- Glimeperide
- Glipizide
- Glufosinate
- Glutethimide
- Glycinexylidide
- Glycinexylidide (GX)
- Granisetron
- Griseofulvin
- GTS-21
- Guaiphenesin
- Guanoxan