A solid preparation for internal use which is characterized in that ambroxol hydrochloride, L-carbocysteine and acetaminophen are simultaneously formulated and are allowed to coexist. In this solid preparation for internal use which has high product value, the decomposition of the ambroxol hydrochloride by the L-carbocysteine over time is significantly suppressed and the medicinal effects of both components are fully exhibited.本發明係提供一種內服用固形製劑，其特徵係同時摻混鹽酸氨溴索(Ambroxol HCl)、L-羧甲司坦(L-Carbocisteine)以及乙醯胺酚(Acetaminophen)，且使該等藥物共存，可顯著地抑制因L-羧甲司坦引起之鹽酸氨溴索之經時性分解，且可使二成分之藥效充分發揮，係具高製品價值之內服用固形製劑。
