（《本经》下品）
【释名】雷实（《别录》）、雷矢（同上）、
时珍曰∶雷斧、雷楔，皆霹雳击物精气所化。此物生土中，无苗叶而杀虫逐邪，犹雷之
丸也。竹之余气所结，故曰竹苓。苓亦屎也，古者屎、苓字通用。
【集解】《别录》曰∶雷丸生石城山谷及汉中土中。八月采根，曝干
弘景曰∶今出建平、宜都间。累累相连如丸。
恭曰∶雷丸，竹之苓也。无有苗蔓，皆零，无相连者。今出房州、金州。
时珍曰∶雷丸大小如栗，状如猪苓而圆，皮黑肉白，甚坚实。
【修治】 曰∶凡使，用甘草水浸一夜，铜刀刮去黑皮，破作四、五片。以甘草水再浸
一宿，蒸之，从巳至未，晒干。酒拌再蒸，晒干用。
大明曰∶入药炮用。
【气味】苦，寒，有小毒。
《别录》曰∶咸，微寒，有小毒。赤者杀人，白者善。
普曰∶神农∶苦；黄帝、岐伯、桐君∶甘，有毒；扁鹊∶甘，无毒。
李当之∶大寒。
权曰∶苦，有小毒。
时珍曰∶甘、微苦，平。
之才曰∶荔实、浓朴、芫花为之使，恶蓄根、葛根。
【主治】杀三虫，逐毒瓦斯胃中热。利丈夫，不利女子（《本经》）。
作摩膏，除小儿百病，逐邪气恶风汗出，除皮中热结积蛊毒，白虫寸白自出不止。久服，
令人阴痿（《别录》）。逐风，主癫痫狂走（甄权）。
【发明】弘景曰∶《本经》云利丈夫，
《别录》曰∶久服阴痿，于事相反。
志曰∶《经》言利丈夫不利女子，乃疏利男子元气，不疏利女子脏气，故曰久服令人阴
痿也。
时珍曰∶按∶范正敏《遁斋闲览》云∶杨 中年得异疾，每发语，腹中有小声应之，久
渐声大。有道士见之曰∶此应声虫也。但读本草，取不应者治之。读至雷丸，不应。遂顿服
数粒而愈。
【附方】旧一，新一。
小儿出汗有热∶雷丸四两，粉半斤，为末扑之。（《千金方》）。
下寸白虫∶雷丸，水浸去皮，切焙为末。五更初，食炙肉少许，以稀粥饮服一钱匕。须
上半月服，虫乃下。（《经验前方》）。
筋肉化虫∶方见石部雄黄下。
（收录于《神农本草经》下品）
【释名】雷实（出自《名医别录》）、雷矢（同上）。
李时珍说：雷斧、雷楔，都是雷电击中物体时精气所化成的。这种药物生长在土壤中，没有茎叶，能杀虫驱邪，就像雷丸一样。它是竹子余气凝结而成，所以叫竹苓。“苓”字在古代也通“屎”字，古时候“屎”和“苓”两个字是通用的。
【集解】《名医别录》说：雷丸生长在石城山谷及汉中的土壤中。八月采集根部，晒干。
陶弘景说：现在出产于建平、宜都之间。果实累累相连，像丸子一样。
苏恭说：雷丸，是竹子的余气凝结物。没有茎蔓，都是零散的，没有相连的。现在出产于房州、金州。
李时珍说：雷丸大小像栗子，形状像猪苓但更圆，外皮黑色，内肉白色，质地非常坚实。
【修治】某人说：凡使用雷丸，需用甘草水浸泡一夜，用铜刀刮去黑皮，破成四、五片。再用甘草水浸泡一个晚上，蒸制，从巳时到未时，晒干。用酒拌和后再次蒸制，晒干后使用。
孟洗（大明）说：入药需炮制后使用。
【气味】味苦，性寒，有小毒。
《名医别录》说：味咸，微寒，有小毒。红色的会致人死亡，白色的疗效好。
李当之（普）说：神农认为味苦；黄帝、岐伯、桐君认为味甘，有毒；扁鹊认为味甘，无毒。
李当之说：大寒。
甄权（权）说：味苦，有小毒。
李时珍说：味甘、微苦，性平。
徐之才（之才）说：荔实、厚朴、芫花是其引经药（使之），畏蓄根、葛根。
【主治】杀灭三虫，驱逐胃中的毒热。对男子有利，对女子不利（出自《神农本草经》）。
制成磨膏，可消除小儿各种疾病，驱除邪气、恶风、汗出，清除皮肤中的热结积聚蛊毒，治疗白虫、寸白虫自行排出不止。长期服用，会导致男子阳痿（出自《名医别录》）。驱风，主治癫痫狂躁奔走（出自甄权）。
【发明】陶弘景说：《神农本草经》说利丈夫，《名医别录》说久服导致阳痿，这两者看似相反。
寇宗奭（志）说：《本经》说利丈夫而不利于女子，是因为它疏泄男子的元气，而不疏泄女子的脏气，所以说长期服用会导致男子阳痿。
李时珍说：查阅范正敏《遁斋闲览》记载：杨中年患了一种怪病，每次说话时，腹中都有小声回应他，久而久之声音变大。有位道士见到后说：这是应声虫。只要读本草经，取其中不产生回应的药物来治疗即可。读到雷丸时，腹中没有回应。于是立刻服用几粒，病就好了。
【附方】旧方一首，新方一首。
小儿出汗发热：雷丸四两，米粉半斤，研为细末扑身。（出自《千金方》）。
驱除寸白虫：雷丸，用水浸泡去皮，切片焙干研为细末。五更初，吃少许烤肉，用稀粥送服一钱匕的药末。必须在农历上半月服用，虫子才能排出。（出自《经验前方》）。
筋肉化生虫：方剂见石部雄黄条下。
(Recorded in the Lower Grade of *Shennong Bencao Jing*)
**[Names]** Leishi (Thunder Fruit, from *Mingyi Bielu*), Leishi (Thunder Excrement, ibid.).
Li Shizhen states: Lei Fu (Thunder Axe) and Lei Xi (Thunder Wedge) are all formed by the essence and qi when lightning strikes objects. This substance grows in the soil, has no stems or leaves, and can kill parasites and expel pathogenic factors, resembling a thunderball. It is formed by the residual qi of bamboo, hence called Zhuling (Bamboo Fungus). The character "Ling" was also used interchangeably with "Shi" (feces) in ancient times; thus, "Shi" and "Ling" were commonly used as interchangeable characters.
**[Collection and Description]** *Mingyi Bielu* states: Leiwanzhang grows in the valleys of Shicheng and in the soil of Hanzhong. The roots are harvested in August and dried in the sun.
Tao Hongjing states: It is currently produced between Jianping and Yidu. The fruits grow in clusters connected to each other, resembling pills.
Su Gong states: Leiwanzhang is the residual qi concretion of bamboo. It has no stems or vines, is scattered individually, and not connected. It is currently produced in Fangzhou and Jinzhou.
Li Shizhen states: Leiwanzhang is the size of a chestnut, rounder than Zhu Ling (Polyporus), with black skin and white flesh, and is very solid.
**[Preparation]** An unnamed author states: When using it, soak it in Licorice Water overnight. Scrape off the black skin with a copper knife and break it into four or five pieces. Soak again in Licorice Water for another night, steam it from Si hour to Wei hour, and dry it in the sun. Mix with wine, steam again, and dry in the sun before use.
Meng Xi states: It should be processed (pao) before medicinal use.
**[Flavor and Properties]** Bitter, Cold, slightly toxic.
*Mingyi Bielu* states: Salty, slightly Cold, slightly toxic. The red ones are lethal, while the white ones are effective.
Li Zhiang states: Shennong considered it Bitter; Huangdi, Qibo, and Tongjun considered it Sweet and Toxic; Bianque considered it Sweet and Non-toxic.
Li Dangzhi states: Greatly Cold.
Zhen Quan states: Bitter, slightly toxic.
Li Shizhen states: Sweet, slightly Bitter, Neutral.
Xu Zhicai states: Lishi (Lychee Seed), Houpo (Magnolia Bark), and Yuanhua (Genkwa Flower) act as its guides/enablers; it is incompatible with Xugen (Aconitum Root) and Gegen (Pueraria Root).
**[Indications]** Kills the three types of parasites, expels toxic heat in the stomach. Beneficial for men, but detrimental to women (*Shennong Bencao Jing*).
Made into a rubbing ointment, it eliminates various diseases in children, expels pathogenic factors, aversion to wind, and sweating. It clears heat accumulation and gu poison in the skin, and treats continuous discharge of Bai Chong (white worms) and Cunbai Chong (tapeworms). Long-term use causes impotence in men (*Mingyi Bielu*). Expels wind, primarily treats epilepsy and manic wandering (*Zhen Quan*).
**[Analysis and Commentary]** Tao Hongjing states: *Shennong Bencao Jing* says it benefits men, while *Mingyi Bielu* says long-term use causes impotence; these seem contradictory.
Kou Zongshi states: The statement that it benefits men but not women implies that it drains the primordial qi of men without draining the organ qi of women; hence, long-term use leads to male impotence.
Li Shizhen states: According to Fan Zhengmin's *Dunzhaiianlan*, Yang Zhongnian suffered from a strange illness where his abdomen would echo every time he spoke, eventually growing louder. A Daoist priest observed this and said: "This is an echoing worm. Read through the Materia Medica and use the herb that does not produce an echo." When reading about Leiwanzhang, there was no echo. He immediately took several pills and was cured.
**[Attached Prescriptions]** One old prescription, one new prescription.
Children's sweating with fever: Leiwanzhang 4 liang, rice flour 8 liang, ground into powder and dusted on the body (*Qianjin Fang*).
Expelling tapeworms: Leiwanzhang, soaked in water, peeled, sliced, baked, and ground into powder. At dawn, consume a small amount of roasted meat, then take one qianbi of the powder with thin porridge. It must be taken during the first half of the lunar month for the worms to be expelled (*Jingyan Qianfang*).
Parasites generated from muscle and tendon: See the prescription under Xionghuang (Realgar) in the Stone section.