Delta-9 THC, Delta-8 THC and Delta-10 THC are very similar molecules with different arrangements of atoms attached to them; each causes very different effects when consumed. Delta-9 THC metabolizes into 11-hydroxy-THC, which is also psychoactive. This substance may be helpful in treating nausea, cancer, chronic pain, arthritis, anorexia nervosa, inflammation and spasticity in patients who have multiple sclerosis.