Isn’t that medicine what’s hurting him? Or is it something different?

It's probably a heat suppressant or some kind of medicine for the body since... Yk they went for it like three days

i think their medicine shape all same with different purposes. i dont think Shar will give him a medicine that can hurt Etin ┐(´ー｀)┌
maybe like a vitamin or something to boost Etin body