Symptoms of grape poisoning include vomiting, diarrhea, and excessive thirst.

葡萄中毒的症状包括呕吐、腹泻和极度口渴。

Excessive thirst is a common side effect. The water's what's been screwing up his sodium level.

极度口渴是常见的副反应。大量喝水就会影响他的血钠水平。