allergic rhinitis 鼻敏感 同 濕疹都係過敏反應
antihistamine 呢個class 嘅藥係可以擋咗一隻叫 histamine 嘅嘢。 histamine 有份負責激活身體嘅過敏反應。所以有關過敏嘅嘢antihistamine 都會幫到手。 同時你腦入面histamine亦有份控制睡眠(可以google histamine receptor 去睇睇histamine 嘅作用),所以有啲histamine 會引起睡意。
但係antihistamines 到感冒其實作用有限
Although oral and intranasal H1-antihistamines have demonstrated efficacy against nasal congestion in patients with allergic rhinitis,10,22 the magnitude of benefit is relatively modest and less pronounced than that observed with decongestants or intranasal steroids.10,23–28 Some improvement in congestion with oral and/or intranasal H1-antihistamines has also been reported in patients with nonallergic/vasomotor rhinitis,29,30 rhinosinusitis,31 and nasal polyposis,32,33 whereas no effect on congestion was evident in studies of H1-antihistamines in patients with the common cold.
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2866555/
不過如果你食完有用嘅其實可以繼續食,藥係用黎醫人,個個人反應唔同,唔會下下跟足書做。