| Mao - Meg | Nummer |
| Maokonin | 14 |
| Maprotilin | xxx |
| Margarinsäure | 16 |
| Margerite | 18 |
| Mariendistel | 16 |
| Maronenröhrling | |
| Marrubiin | 14 |
| Marrubium vulgare | 16 |
| Marsdenia cundurango | |
| Martiusgelb | |
| Märzenbecher | |
| Mazindol | xxx |
| Masonin | 18 |
| Massoialacton | xxx |
| Massoiarindenöl | xxx |
| Mastix | 18 |
| Mate-Teestrauch | 14 |
| Matricaria recutita | 18 |
| Mauerpfeffer, Scharfer | 16 |
| Mayers Reagenz | 14 / 12 |
| Mazindol | 14 |
| M C P A | 14 / # 6 Augen |
| M C P A - Salze und -Ester | 14 |
| M C P B | |
| M C P B -Salze und -Ester | |
| Mebendazol | xxx |
| Mecamylamin | 16 |
| Mecarbam | 4 / 18 / 19 |
| Mechlorethamin | 14 / 16 / 18 / 19 / 19a+c / # 21 Haut / »Sofort(!)-Nat« |
| Meclofenoxat | 16 |
| Meclofenoxat-Hydrochlorid | |
| Mecloqualon | 17 |
| Mecoprop | 14 / # 6 Augen |
| Mecoprop - P | 14 |
| Ester von Mecoprop | 14 / 18 / # 6 Augen |
| Ester von Mecoprop - P | |
| Salze von Mecoprop - P | # 6 Augen |
| Mecoprop-Methylester | 14 / # 6 Augen |
| Mecrilat | 16 / 18 |
| Medazepam | 17 |
| Medinoterb | 14 / 18 / 19 |
| Medinoterbacetat | |
| Medizin | xxx |
| Medizinal-Rhabarber | 15 |
| Medrogeston | xxx |
| Medronsäure | 2 |
| Meerweinsalz | 5 |
| Meerzwiebel, Echte | 14 |
| Meerzwiebel, Falsche | 16 |
| Meerzwiebel-glykoside | 14 |
| Mefeclorazin | 16 |
| Mefenaminsäure | xxx |
| Mefenorex | 14 |
| Mefenpyr | 16 |
| Mefenpyrdiethyl | 14 |
| Mefentanyl | |
| Mefluidid | 14 / 18 / 19 |
| Megycollybia platyphylla | 16 |