The present invention relates to a herbal composition containing Longan seed extract and quercetin, and relates to the purpose of urination improvement, especially for alleviation of the urinary retention caused by drugs. The present invention is the first to prepare the herbal composition from the combination of Longan seed extract and quercetin, and has been proved by animal test. The herbal composition according to the present invention can also be used to prepare the health care product or pharmaceuticals for alleviation of the drug-induced urinary retention, particularly due to non-opiate narcotics.本發明係關於一種包含龍眼核萃取物(Longan seed extract)與槲皮素(quercetin)之草本組合物,用於促進排尿,特別是用於減緩因藥物引起的尿滯留副作用。