| DB00114 | Pyridoxal phosphate | approved, investigational, nutraceutical | unknown | cofactor | Details |
| DB01917 | Putrescine | experimental | unknown | | Details |
| DB02209 | Pyridoxine phosphate | experimental | unknown | | Details |
| DB02824 | N-Pyridoxyl-Glycine-5-Monophosphate | experimental | unknown | | Details |
| DB03856 | L-Eflornithine | experimental, investigational | unknown | | Details |
| DB04083 | N(6)-(pyridoxal phosphate)-L-lysine | experimental | unknown | | Details |
| DB04263 | Geneticin | experimental | unknown | | Details |
| DB00127 | Spermine | experimental, nutraceutical | unknown | product of | Details |
| DB06243 | Eflornithine | approved, withdrawn | yes | antagonistblocker | Details |
| DB00313 | Valproic acid | approved, investigational | unknown | downregulator | Details |
| DB00203 | Sildenafil | approved, investigational | unknown | downregulator | Details |