ICD-10-CM
- Nabilone
- Nabumetone
- Nadolol
- Nafcillin
- Nafoxidine
- Naftazone
- Naftidrofuryl (oxalate)
- Naftifine
- Nail polish remover
- Nalbuphine
- Naled
- Nalidixic acid
- Nalorphine
- Naloxone
- Naltrexone
- Namenda
- Nandrolone
- Naphazoline
- Naphtha (painters') (petroleum)
- Naphthalene (non-chlorinated)
- Naphthol
- Naphthylamine
- Naphthylthiourea (ANTU)
- Naprosyn
- Naproxen
- Narcotic (drug)
- Narcotine
- Nardil
- Nasal drug NEC
- Natamycin
- Natrium cyanide
- Natural
- Nealbarbital
- Nectadon
- Nedocromil
- Nefopam
- Nematocyst (sting)
- Nembutal
- Nemonapride
- Neoarsphenamine
- Neocinchophen
- Neomycin (derivatives)
- Neonal
- Neoprontosil
- Neosalvarsan
- Neosilversalvarsan
- Neosporin
- Neostigmine bromide
- Neraval
- Neravan
- Nerium oleander
- Nerve gas, not in war
- Nesacaine
- Netilmicin
- Neurobarb
- Neuroleptic drug NEC
- Neuromuscular blocking drug
- Neutral insulin injection
- Neutral spirits
- Niacin
- Niacinamide
- Nialamide
- Niaprazine
- Nicametate
- Nicardipine
- Nicergoline
- Nickel (carbonyl) (tetra-carbonyl)(fumes) (vapor)
- Nickelocene
- Niclosamide
- Nicofuranose
- Nicomorphine
- Nicorandil
- Nicotiana (plant)
- Nicotinamide
- Nicotine (insecticide) (spray) (sulfate) NEC
- Nicotinic acid
- Nicotinyl alcohol
- Nicoumalone
- Nifedipine
- Nifenazone
- Nifuraldezone
- Nifuratel
- Nifurtimox
- Nifurtoinol
- Nightshade, deadly (solanum)
- Nikethamide
- Nilstat
- Nilutamide
- Nimesulide
- Nimetazepam
- Nimodipine
- Nimorazole
- Nimustine
- Niridazole
- Nisentil
- Nisoldipine
- Nitramine
- Nitrate, organic
- Nitrazepam
- Nitrefazole
- Nitrendipine
- Nitric
- Nitrimidazine
- Nitrite, amyl (medicinal) (vapor)
- Nitroaniline
- Nitrobenzene, nitrobenzol
- Nitrocellulose
- Nitrodiphenyl
- Nitrofural
- Nitrofurantoin
- Nitrofurazone
- Nitrogen
- Nitroglycerin, nitro-glycerol (medicinal)
- Nitroglycol
- Nitrohydrochloric acid
- Nitromersol
- Nitronaphthalene
- Nitrophenol
- Nitropropane
- Nitroprusside
- Nitrosodimethylamine
- Nitrothiazol
- Nitrotoluene, nitrotoluol
- Nitrous
- Nitroxoline
- Nitrozone
- Nizatidine
- Nizofenone
- Noctec
- Noludar
- Nomegestrol
- Nomifensine
- Nonoxinol
- Nonylphenoxy (polyethoxy-ethanol)
- Noptil
- Noradrenaline
- Noramidopyrine
- Norbormide
- Nordazepam
- Norepinephrine
- Norethandrolone
- Norethindrone
- Norethisterone (acetate) (enantate)
- Noretynodrel
- Norfenefrine
- Norfloxacin
- Norgestrel
- Norgestrienone
- Norlestrin
- Norlutin
- Normal serum albumin (human), salt-poor
- Normethandrone
- Normison
- Normorphine
- Norpseudoephedrine
- Nortestosterone (furanpropionate)
- Nortriptyline
- Noscapine
- Nose preparations
- Novobiocin
- Novocain (infiltration) (topical)
- Noxious foodstuff
- Noxiptiline
- Noxytiolin
- NPH Iletin (insulin)
- Numorphan
- Nunol
- Nupercaine (spinal anesthetic)
- Nutmeg oil (liniment)
- Nutritional supplement
- Nux vomica
- Nydrazid
- Nylidrin
- Nystatin
- Nytol