状如蚬蛤。色如土。坚重如石。永州祁阳县西北十里有土冈。掘深丈余取之。（恭）祁
阳县江畔沙滩上有之。或云生洞中。采无时。（颂）石燕有二。一种石类。即是此药。状类
燕而有文。圆大为雄。长小为雌。一种禽类。乃钟乳穴中石燕似蝙蝠者。食乳汁。能飞。见
禽部。（濒湖）
气味甘凉。主疗眼目障翳。诸般淋沥。久患消渴。脏腑频泻。肠风痔 。年久不瘥。面
色虚黄。饮食无味。妇人月水湛浊。赤白带下多年者。每日磨汁饮之。一枚用三日。以此为
准。亦可为末。水飞过。每日服半钱至一钱。米饮服至一月。诸疾悉平。（濒湖） 石燕乃
利窍行湿热之物。观治疝方。有用川乌川楝茴香破其外寒。而石燕土狗辈利其郁热者。知兹
味能利窍行湿于下焦也。小便淋痛。石燕七枚。捣黍米大。新桑根白皮三两锉。拌匀。分七
帖。每帖用水一盏。煎七分。空心午前服。牢牙止痛。
石燕三对。火 醋淬七次。青盐乳香各一两。细辛半两。为末揩之。荆芥汤漱口。一方。
去
日用。揩牙后以温酒漱咽之。
〔论〕 石燕得土气之精专。而气味甘凉。即一二单方多属骨之合肾以为治。是濒湖所
列诸疾效。当不谬也。
是冬月蛇蛰时所含土。到春发蛰吐之而去者。大如弹丸。坚如石。外黄内黑色。（颂）
昔人每用蛇黄。后因其难得。遂以蛇含石代之。
形状像蚬蛤。颜色像泥土。坚硬沉重像石头。永州祁阳县西北十里有土冈，挖掘深一丈多取用。（苏恭）祁阳县江畔沙滩上有这种石头。有人说生长在洞穴中，采集没有固定时间。（苏颂）石燕有两种。一种属于石类，就是此药。形状像燕子且有纹理，圆大为雄，长小为雌。另一种属于禽类，是钟乳穴中像蝙蝠的石燕，食用乳汁，能飞翔，见禽部记载。（李时珍）
气味甘凉。主治眼目障翳，各种淋沥症，久患消渴病，脏腑频繁腹泻，肠风痔漏，多年不愈，面色虚黄，饮食无味，妇人月经浑浊，赤白带下多年的患者。每天磨汁饮用，一枚药可用三天，以此为准则。也可以研为粉末，用水飞法处理，每天服用半钱至一钱，米汤送服，持续一个月，各种疾病即可痊愈。（李时珍）石燕是通利窍道、行散湿热的药物。观察治疗疝气的方剂，有用川乌、川楝子、茴香破除外寒，而用石燕、土狗等通利郁热，可知此味药能于下焦通利窍道、行散湿气。小便淋痛，用石燕七枚，捣碎如黍米大小，新桑根白皮三两切碎，拌匀，分作七帖。每帖用水一盏，煎至七分，空腹午前服用。坚固牙齿止痛，用石燕三对，用火醋淬炼七次，青盐、乳香各一两，细辛半两，研为粉末揩擦牙齿。荆芥汤漱口。另一方法，去掉（前法中的某些步骤？原文此处似有脱漏或简略），每日使用，揩牙后用温酒漱口咽下。
〔论述〕 石燕得土气之精专，且气味甘凉，即一二单方多属骨之合肾以为治。因此李时珍所列诸疾有效，应当不会谬误。
这是冬月蛇蛰伏时所含的土，到春发蛰吐出来而抛弃的。大如弹丸，坚硬如石，外表黄色内部黑色。（苏颂）
古人常用蛇黄，后来因为难以得到，便以蛇含石代替。
Resembling clams or cockles. Color like soil. Hard and heavy like stone. Found ten *li* northwest of Qiyang County in Yongzhou, where it is dug from an earthen mound to a depth of over one *zhang* (approx. 3.3 meters). (Su Gong) It is also found on the sandy banks of rivers in Qiyang County. Some say it grows in caves, and can be collected at any time. (Su Song) There are two types of Shiyan (Stone Swallow). One type is mineral-like; this is the medicinal material. It resembles a swallow with patterns; round and large specimens are male, long and small ones are female. The other type is avian; these are "stone swallows" resembling bats found in stalactite caves, which feed on milk and can fly. See the section on Birds. (Li Shizhen)
Flavor: Sweet; Nature: Cool. Indications: Eye opacities (cataracts/obscuration), various types of strangury (dysuria), chronic thirst-disease (Xiaoke/Wasting-thirst), frequent diarrhea due to visceral dysfunction, intestinal wind and hemorrhoids that have persisted for years without healing, sallow complexion, loss of taste/appetite, turbid menstruation in women, and leukorrhea (red and white discharge) persisting for many years. Grind into juice daily for oral administration; one piece lasts three days as a standard. Alternatively, grind into powder, process by water flotation (Shui Fei), take half a *qian* to one *qian* daily, administered with rice drink. After one month, all ailments will subside. (Li Shizhen) Shiyan is a substance that unblocks orifices and promotes the movement of damp-heat. Observing formulas for treating hernia, where Chuanwu (Aconitum carmichaelii radix preparata), Chuanlianzi (Meliae fructus), and Huixiang (Foeniculi fructus) are used to dispel external cold, while Shiyan and Tudou (Gecko) are used to clear stagnant heat, it is known that this herb can unblock orifices and move dampness in the Lower Jiao. For painful strangury, use seven pieces of Shiyan, crushed to the size of millet seeds, combined with three *liang* of freshly cut white bark of Mulberry root (Sangbaipipi), mixed well, divided into seven doses. Each dose is decocted with one cup of water until reduced to 70%, taken on an empty stomach before noon. To strengthen teeth and relieve pain, use three pairs of Shiyan, quenched seven times in vinegar after calcination, combined with one *liang* each of Qingyan (Halitum) and Ruxiang (Olibanum), and half a *liang* of Xixin (Asari Radix et Rhizoma), ground into powder to rub on teeth. Rinse mouth with Jingjie (Schizonepetae herba) decoction. Another method: remove [previous ingredients?], use daily; after rubbing teeth, rinse and swallow with warm wine.
[Discussion] Shiyan obtains the essence of Earth Qi, and its flavor is sweet and nature cool. Even simple single-herb prescriptions often combine bone-related substances with Kidney treatments. Therefore, the efficacy listed by Li Shizhen for various diseases is likely not erroneous.
This refers to the earth contained during hibernation in winter, expelled and discarded when snakes emerge from hibernation in spring. Size like a pellet, hard like stone, yellow outside and black inside. (Su Song)
In ancient times, Shehuang (Snake Gallstone) was commonly used, but later, due to its scarcity, it was replaced by Shehanshi (Snake-Containing Stone).