Appy Fast Syrup is a combination medicine used to treat loss of appetite. It is an effective appetite stimulant. This works by reducing the effect of a chemical messenger which regulates appetite. AP-Fast Syrup stimulates appetite by improving the metabolism of the body. It functions by enhancing liver function, which speeds up digestion and increases hunger. Appy Fast Syrup helps the body produce enough energy to carry out the daily work without feeling fatigued.