Desyrel tablets are available in three dosages: 25 mg, 50 mg, and 100 mg. The active ingredient, trazodone, is used primarily to treat major depressive disorder. In addition to improving mood, it may enhance appetite and energy levels while reducing anxiety and sleep disturbances linked to depression. Desyrel functions by helping to restore the balance of serotonin, a natural neurotransmitter, in the brain. This medication is marketed under various brand names globally.