intolerance (to food, drug, etc.)
Medical term for a physiological inability to tolerate a substance, such as a food or drug.
乳糖不耐の人は牛乳を飲むとお腹を壊すことがある。
People with lactose intolerance may get an upset stomach when they drink milk.
lactose intolerance
From 不 (not) + 耐 (endure, tolerate). A straightforward kanji compound meaning 'intolerance'.