I just posted a reply two days ago on another members thread. He had liver failure issues and when I looked at Kratom this is what I found:
Seizure episodes and withdrawal syndromes reported are mostly related to chronic consumption of kratom or to acute overdose cases [37,42,54]. The hepatotoxicity reports [54,95] are also very rare and mostly linked to long-term kratom consumption or to its excessive intake
Now it may well be dose related but be aware.