Isekai Yakkyoku - Chapter 1.2

Isekai Yakkyoku - Chapter 1.2 - A young pharmacologist and researcher in Japan died from overworking and was reincarnated in a Medieval Parallel Europe.

Isekai Yakkyoku (Parallel World Pharmacy)

Isekai Yakkyoku, Chapter 2 - Isekai Yakkyoku Manga Online

Isekai Yakkyoku, Chapter 27.1 - Isekai Yakkyoku Manga Online

Isekai Yakkyoku - Episode 11 discussion : r/anime

Recently, I've read many mangas where the MC starts off as weak

Isekai Yakkyoku Chapter 31 - ManhwaZ

Manga: Isekai Yakkyoku Chapter - 46-eng-li

Isekai Yakkyoku - Chapter 1.2

Parallel World Pharmacy, Isekai Wiki