25,729 articles
Xiaoluo Wan
消瘰丸 (Xiaoluo wan), a classical Chinese medicine formula from 《医学心悟》 of 玄参, 牡蛎, and 贝母 (1:1:1) for scrofula and phlegm nodules; distinct from 消渴丸 and 内消瘰疬丸; studied for thyroid nodules, lymphoma, and pulmonary nodules.
Xiaor Yaozheng Zhijue
Xiaor Yaozheng Zhijue (小儿药证直诀), also Qianshi Xiaor Yaozheng Zhijue, a 1119 Song pediatric classic compiled by Yan Jizhong from Qian Yi's teachings; three juan, five-zang pattern identification, source of Liuyi Dihuang Wan and Daochi San.
Xiaoxuming Decoction
小续命汤 (Xiaoxuming Decoction), a 12-herb classical Chinese formula from Sun Simiao's Beiji Qianjin Yaofang, once the leading pre-Song stroke prescription, now re-studied for ischemic stroke, facial paralysis, and rheumatoid arthritis.
Xiexin Tang
泻心汤 (Xiexin decoction), a family of five Zhang Zhongjing formulas from the Shanghan Lun treating pi syndrome (epigastric fullness), plus a three-herb dahuang-huangqin-huanglian version used to drain fire and stop bleeding.
Ximelagatran
Ximelagatran (Exanta, Exarta) was AstraZeneca's oral prodrug of melagatran, the first oral direct thrombin inhibitor; noninferior to warfarin but withdrawn worldwide in February 2006 for hepatotoxicity.
Xin Yi San
Xin Yi San (辛夷散) is a classic Chinese medicine formula from Yan Yonghe's Song-dynasty Yan Shi Ji Sheng Fang: ten equal-part herbs led by magnolia flower bud, dispersing wind-cold and opening nasal orifices for congestion, rhinorrhea, and sinus disease.
Xingpi Jieyu tablets
Xingpi Jieyu tablets (醒脾解郁片), formerly Yushuda tablets, are a Class 1.1 traditional Chinese medicine for mild and moderate depression of the damp-turbidity-obstructing-spleen pattern, approved by China's NMPA in September 2026 and made by Sinopharm Tongjitang (Guizhou).
Xinjia Xiangru Yin
新加香薷饮 (Xinjia Xiangru Yin), Supplemented Elsholtzia Decoction, a classical Chinese medicine formula from Wu Jutong's Wen Bing Tiao Bian; five herbs (xiangru, yinhua, lianqiao, biandouhua, houpo) for summer-heat warmth with chills and no sweating.
Xiphoid process
Xiphoid process (xiphisternum, processus xiphoideus sterni): the smallest, most inferior part of the sternum, 2–5 cm, cartilage at birth ossifying variably with age; anchors the diaphragm, rectus abdominis, obliques, and linea alba, and is highly variable in shape (bifid, curved, foramina).
XK aprosencephaly syndrome
XK aprosencephaly syndrome (Garcia-Lurie syndrome, XK syndrome) is an extremely rare autosomal recessive cerebral malformation with absence of the telencephalon and diencephalon, oculo-facial anomalies, limb defects, and anal atresia; OMIM 207770.
Xl550
Xl550 is esaxerenone (CS-3150), a nonsteroidal mineralocorticoid receptor antagonist discovered by Exelixis and approved in Japan (2019) for hypertension and studied in diabetic kidney disease.
XMEN
XMEN disease (X-linked immunodeficiency with magnesium defect, EBV infection, and neoplasia; also MAGT1 deficiency) is a rare X-linked male immunodeficiency causing chronic EBV viremia, lymphoma risk, and low NKG2D, partly treatable with oral magnesium.
XNW22013 (SOS1 inhibitor program)
XNW22013 (XNW-22013) is Evopoint Biosciences' preclinical small-molecule SOS1 inhibitor for solid tumors, licensed globally to METiS Therapeutics in January 2023 for up to several hundred million dollars, planned for combination with the KRAS G12C inhibitor XNW14011.
Xp21 deletion syndrome
Xp21 deletion syndrome (Xp21 contiguous gene deletion syndrome, complex glycerol kinase deficiency, OMIM 300679) is a rare X-linked microdeletion disorder removing NR0B1, GK, DMD, and sometimes IL1RAPL1, causing adrenal insufficiency, glycerol kinase deficiency, and Duchenne muscular dystrophy in males.
Xp22.13p22.2 duplication syndrome
Xp22.13p22.2 duplication syndrome is a rare X-linked disorder caused by an extra copy of DNA on the X chromosome, causing intellectual disability in males; female carriers have normal intelligence.
Xpert MTB/RIF assay
The Xpert MTB/RIF assay is an automated cartridge-based molecular test that detects tuberculosis DNA and rifampicin resistance directly from unprocessed sputum in under two hours, endorsed by WHO in 2010.
Xuan Bi Tang
宣痹汤 (Xuan Bi Tang) is a Qing-dynasty formula from Wu Jutong's Wenbing Tiaobian for damp-heat painful obstruction, composed of fangji, coix, apricot kernel, talc and five other drugs; distinct from the upper-jiao formula of the same name and now studied as adjunct therapy in rheumatoid arthritis.
Xuanfei Baidu granules
Xuanfei Baidu granules (宣肺败毒颗粒), a 13-herb Chinese patent medicine by Shandong Buchang, NMPA-approved 2 March 2021 for damp-toxin lung epidemic disease; one of the COVID-19 'three medicines and three formulations'.
Xuanqi Jiangu tablets
Xuanqi Jiangu tablets (玄七健骨片), also called Jingu Le tablets, are a Class 1.1 Chinese patent medicine by Hunan Fangsheng, NMPA-approved November 2021 for mild-to-moderate knee osteoarthritis with tendon-vessel stasis syndrome, 4 tablets three times daily.
XXYYY syndrome
XXYYY syndrome (49,XXYYY, 2X 3Y syndrome) is an extremely rare male sex chromosome aneuploidy with 49 chromosomes, two extra Y and one extra X, causing hypotonia, genital anomalies, tall stature, intellectual disability, and developmental delay.
Xylometazoline
Xylometazoline (Otrivin) is an imidazoline alpha-adrenergic nasal decongestant developed in the late 1940s, acting within 5–10 minutes for up to 10 hours; UK use now limited to 5 consecutive days due to rebound congestion risk.
XYY syndrome
XYY syndrome (47,XYY, Jacob's syndrome) is a male sex chromosome aneuploidy with an extra Y chromosome, occurring in about 1 in 1,000 newborns, causing tall stature, learning and speech difficulties, usually normal fertility, and frequent underdiagnosis.
Y-balance test
The Y-balance test is a low-cost field test of dynamic balance in which a person balances on one leg and reaches with the other in three directions.
Y-shape pegylated somatropin (怡培生长激素)
Y-shape pegylated somatropin (怡培生长激素, Inpegsomatropin, brand 益佩生/Pegpesen) is Xiamen Amoytop's once-weekly 40 kD Y-shaped branched PEG-modified growth hormone, NMPA-approved May 2025 for pediatric GHD, with phase 3 noninferior growth velocity and zero anti-drug antibodies versus daily rhGH.
Yajiulei
雅旧勒 (Yajiale) is a Dai medicine formula from the classic Dang Haya Tadu Dangxi, listed in China's second batch ancient classic formula catalog as a hemostatic powder for various bleedings, also known as 旧曼调经汤.
Yakrdari lauha
Yakrdari lauha (यकृदरि लौह), also Yakridari Lauha or Yakṛtplīhāri lauha, is an Ayurvedic herbo-mineral iron tablet (AFI 21:7) for liver and spleen disorders, with clinical anemia data and rat-toxicology findings.
Yakrt plihari lauha
Yakrt plihari lauha (Yakritplihari Lauha, यकृत-प्लीहांरि लौह) is a classical Ayurvedic herbomineral iron formulation from Bhaishajya Ratnavali used for liver and spleen disorders such as splenomegaly and jaundice.
Yale New Haven Hospital
Yale New Haven Hospital (YNHH), founded 1826 as the General Hospital Society of Connecticut, is a 1,541-bed nonprofit teaching hospital in New Haven, Connecticut, flagship of Yale New Haven Health and primary teaching hospital of Yale School of Medicine.
Yallaferon
Yallaferon (人干扰素α2b凝胶) is a recombinant human interferon α-2b gel marketed by Lee's Pharmaceutical Holdings in China for topical and vaginal treatment of viral infections, including cervical erosion, genital herpes, and condyloma acuminatum.
Yamane technique
The Yamane technique is a sutureless operation for fixing a three-piece intraocular lens in eyes lacking capsular support, introduced by Shin Yamane and colleagues in 2013.