- n-acetylcysteine
- nabumetone
- nadolol
- nadolol + bendroflumethiazide
- nafarelin
- nalidixic acid
- naloxone
- nandrolone
- naphazoline
- naproxen
- natamycin
- nebivolol
- nefazodone
- neomycin
- neostigmine methyl sulphate
- nevirapine
- niacin
- niacinamide
- niclosamide
- nicotinamide
- nicotine
- nicotine-resin complex
- nicotinic acid
- nifedipine
- nimodipine
- nitrazepam
- nitrofurantoin
- nitrofurazone
- nitroxoline
- nonoxinol
- nonoxynol-9
- norethisterone
- norethisterone + ethinylestradiol
- norethisterone + mestranol
- norethisterone enantate
- norfloxacin
- norgestrel
- normal immunoglobulin for intramuscular injection
- norpseudoephedrine
- nortriptyline
- noscapine
- nutmeg
- nutmeg oil
- nystatin
- nystatin + neomycin + gramicidin + triamcinolone
