- Naftin
- Naglazyme
- Naldecon
- Nalfon
- Nallpen
- Namenda
- Namzaric
- Naproxen
- Narcan
- Nardil
- Nariz
- Naropin
- Nasacort
- Nasalcrom
- Nasofed
- Nasohist-DM
- Nasonex
- Natacyn
- Natazia
- Natesto
- Natpara
- Natrecor
- Natroba
- Navane
- Navelbine
- Nebcin
- Nebupent
- Necitumumab
- Nedocromil
- Neo-Fradin
- Neo-Polycin
- Neo-Synephrine
- Neocidin
- Neomycin
- Neoprofen
- Neostigmine
- Nesina
- Neulasta
- Neumega
- Neupogen
- Neupro
- Nevanac
- NexAVAR
- Nexium
- Nexium IV
- Niacin
- Niacinol
- Niazid
- Niclocide
- Nicotrol
- Nicotrol NS
- Nilandron
- Nimotop
- Nipent
- Nithiodote
- Nitro-Bid
- Nitrocot
- Nizoral
- Nolvadex
- Norco
- Norflex
- Norgesic
- Normodyne
- Noroxin
- Norpace
- Norphyl
- Norpramin
- Northera
- Norvasc
- Norvir
- Nov-Onxol
- Novantrone
- Novolin N Innolet
- NovoLOG
- NovoLOG Aspart
- NovoLOG Mix 70/30
- Novoseven
- Noxafil
- Nplate
- Nubain
- Nucala
- Nucynta
- Nuedexta
- Nulojix
- Numorphan
- Nupercainal
- Nuvigil
- Nydrazid