This comprehensive review explores how psychedelic drugs like psilocybin mushrooms, DMT, and LSD may offer new hope for treating depression, anxiety, and PTSD, especially for patients who don’t respond to conventional antidepressants. Historically used in spiritual ceremonies for thousands of years, these compounds are now being scientifically studied and show promise with fewer side effects than many traditional psychiatric medications. The authors emphasize that while results are encouraging, more research and regulatory approval are needed before these treatments become widely available in mainstream medicine.