Among these, medications like Indoximod, Epacadostat, and Navoximod have shown promise in influencing the immune system and slowing tumor progression, while dual inhibitors like HTI-1090 try to address broader metabolic connections. The use of IDO/TDO inhibitors with conventional anticancer medications demonstrates their potential to reshape cancer treatment paradigms, contingent on further research to optimize efficacy and safety. Clinical Trial Registration: https://clinicaltrials.gov/study/NCT03844438.