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。
中高级英语短文
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。
英语百科
Polydipsia
（重定向自Excessive thirst）
Polydipsia is excessive thirst. The word derives from the Greek πολυδιψία, which is derived from πολύς (polys, "much, many") + δίψα (dipsa, "thirst"). Polydipsia is a nonspecific symptom in various medical disorders. It also occurs as an abnormal behaviour in some non-human animals.