Kàng zǔ'àn yào kěyǐ huǎnjiě dǎ pēntì de zhèngzhuàng.
Antihistamines can relieve sneezing symptoms.
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胺 (àn, 'amine') is the standard chemistry suffix for amines, formed phonetically from English '-amine'. So 组胺 ≈ 'histamine'. The pinyin is zǔ'àn — the apostrophe separates 组 (zǔ) from 胺 (àn) so it's not misread as zǔn.
