Technology

Technology in the world of Weak Constitution: Common Cat is, in some ways, both more advanced and less so than the real world. Much of this can be attributed to the presence of magic and magical materials in the world.

Medicine
Medicine is shown to be somewhat advanced. They have lots of medication types, such as histamine blockers (Chapter 49) and pain pills (Chapter 55). These medications have similar side effects and dosages to real-world equivalents, with Kara saying pain pills should be taken two at a time, and may make someone sleepy.

Considering electrolytes and histamines are mentioned, science must have progressed to a point where those concepts are known and understood by the common person.

Anatomy is well-studied-- when whipping Blue, Kara makes sure to not overlap the strikes and to avoid certain organs, showing he is well aware of how one's health could be impacted by these actions, along with where many organs are in the humanoid body.