| Macrobid and/or Equivalents | Macrobid | 
| Macrodantin and/or Equivalents | Nitrofurantoin Macrocrystals, Teva-Furantoin, Macrodantin, Teva-Nitrofurantoin | 
| Magnesium Caplet and/or Equivalents | Magnesium Caplet | 
| Magnesium Citrate and/or Equivalents | Magnesium Citrate | 
| Magnesium Gluceptate and/or Equivalents | Magnesium Gluceptate Liquid | 
| Magnesium Gluconate and/or Equivalents | Magnesium Easy Absorption, Magnesium Gluconate | 
| Magnesium Oxide and/or Equivalents | Magnesium Oxide | 
| Magnesium Solution and/or Equivalents | Magnesium Solution | 
| Magnolax Liquid and/or Equivalents | Magnolax Liquid Mint, Magnolax Liquid Vanilla | 
| Malarone and/or Equivalents | Malarone Pediatric, Atovaquone/Proguanil, Malarone | 
| Mandelamine and/or Equivalents | Mandelamine | 
| Marcaine Ampule and/or Equivalents | Marcain | 
| Marcaine Vial and/or Equivalents | Marcaine Solution Unit Dose, Marcaine Solution | 
| Marevan and/or Equivalents | Marevan | 
| Marvelon and/or Equivalents | Ethinyl Estradiol/Desogestrel, Freya 21, Freya 28, Marvelon, Marvelon 28, Mirvala 21, Mirvala 28, Reclipsen 21, Reclipsen 28 | 
| Materna and/or Equivalents | Materna | 
| Matulane and/or Equivalents | Matulane | 
| Mavik and/or Equivalents | Mavik, Trandolapril | 
| Maxalt and/or Equivalents | Rizatriptan, Act-Rizatriptan, Apo-Rizatriptan, Co-Rizatriptan, Maxalt | 
| Maxalt RPD and/or Equivalents | Maxalt RPD, Mylan-Rizatriptan ODT, Rizatriptan ODT, Maxalt Melt RPD, Sandoz-Rizatriptan ODT | 
| Maxidex Ophthalmic Ointment and/or Equivalents | Maxidex Ophthalmic Ointment | 
| Maxidex Ophthalmic Suspension and/or Equivalents | Maxidex Ophthalmic Suspension | 
| Maxilene 4 Cream and/or Equivalents | Maxilene 4 Cream | 
| Maxilene 5 Cream and/or Equivalents | Maxilene 5 Cream | 
| Maxitrol Ophthalmic Drops and/or Equivalents | Maxitrol |