The present invention relates to a double-layer tablet capable of improving skin whiteness during sustained-release period, including a sustained-release layer with sustained-release effect when passing through intestine and being dissolved with intestinal fluid, and a speedy-solvent layer being able to be dissolved with gastric juice.本發明係一種在緩釋期間具有美白效果之雙層錠,包含可被胃液溶解之一速崩層,及至腸道才被腸液溶解並具有緩釋效果之一緩釋層。
