How to say “He was treated in hospital after taking an accidental overdose.” in Japanese

In Japanese

薬(くすり)の量(りょう)を間違(まちが)えて、病院(びょういん)で過剰摂取(かじょうせっしゅ)の治療(ちりょう)を受(う)けたんだって。

Kusuri no ryō o machigaete, byōin de kajō sesshu no chiryō o uketan datte.