- Mecamylamine
- Medroxyprogesterone Acetate
- Methacrylic Acid Ester
- Methotrexate
- Methylazoxymethanol Acetate
- Midazolam
- Mirdametinib
- Mitoxanthrone
- Mitragynine
- MK-801
- Monomethyl Auristatin E
- Muscimol
- Mycophenolate Mofetil
- Myriocin
- Nalbuphine
- Napthalene
- Nicotine
- Nitric Oxide Blended With Nitrogen
- Octanoic Acid
- Olaparib
- Oxaliplatin