- Macrobid
- Macrodantin
- Malarone
- Malaseb
- Manerix
- Marcaine
- Matulane
- Mavik
- Maxalt
- Maxalt-MLT
- Maxidex Ophthalmic Ointment
- Maxidex Ophthalmic Solution
- Maxitrol Eye Drops
- Maxitrol Eye Ointment
- Maxzide
- Mayzent
- Medrol
- Medroxyprogesterone
- Megace
- Megace Oral Suspension
- Megestrol
- Mekinist
- Melatonin
- Mellaril
- Menopur
- Mentax
- Mepron
- Mepron Suspension
- Merrem
- Mestinon
- Mestinon SR
- Metacam Oral Suspension
- Metacam for Dogs
- Metformin Hydrochloride
- Methocarbamol
- Methotrexate
- Methotrimeprazine
- Metoclopramide
- Metolazone
- MetroCream
- MetroGel
- Mevacor
- Mexiletine
- Mexitil
- Micardis
- Micardis HCT
- Micronor
- Microzide
- Midamor
- Miglitol
- Migranal Nasal Spray
- Minims Atropine
- Minipress
- Minitran
- Minivelle
- Minocin
- Minoxidil
- Mirapex
- Mirapex ER
- Mirena
- Mirvaso
- Misoprostol
- Mobic
- Mobiflex
- Modicon
- Moduretic
- Molipaxin
- Mometasone Lotion
- Monistat 7
- Monitan
- Monoket
- Monopril
- Monovisc
- Monurol
- Motegrity
- Motilium
- Motrin
- Movantik
- Moviprep
- Moxifloxacin
- Mucomyst
- Multaq
- Muro 128 Ointment
- Muro 128 Solution
- Muse
- Myambutol
- Mycobutin
- Mycostatin
- Mycostatin Cream
- Mycostatin Ointment
- Mycostatin Oral Suspension
- Mydriacyl
- Myfortic
- Myleran
- Myochrysine
- Myoflex
- Myrbetriq
- Mysoline