Educational information, not medical advice — ask your doctor or midwife.
Kikyosekko is a Kampo remedy from Japan. It holds two things: kikyo, the root of the balloon flower, and sekko, which is gypsum, a mineral made of calcium sulfate. People take it for a sore throat with pus and for a cough that comes with a hot, dry feeling.
In Kampo drug lists it is filed as a single drug, not as a mix of formulas. In real use it is often added on top of another Kampo formula, such as one given for a cold. It is meant as a short-term helper while the throat is bad.
Its place in Kampo is long-standing. Its trial record is not: we could find no published human study of Kikyosekko itself. Long use in a tradition is not proof that a remedy works, so read the rest of this page with that in mind.
No one has shown how it works in the body. What follows is the thinking behind it, not proof.
Kikyo root is rich in saponins, which are soap-like plant compounds. In lab dishes and in animals, these seem to loosen thick mucus in the airway. That is where the idea of an easier, looser cough comes from.
Sekko is gypsum, a calcium salt. Old Kampo theory treats it as a cooling agent for signs of heat, such as fever, thirst and a red, hot throat. That is a theory from old medical writing, not a measured body process.
Put the two together and you get the classic Kampo target: a throat that is red, hot, sore and full of pus, with a dry cough. Sekko is thought to cool, and kikyo is thought to drain the pus and free the cough. No human trial has tested this pairing head to head against a dummy pill.
The usual form in Japan is a dried extract granule that you stir into hot water. Tablets and capsules of the same extract are also sold. A Kampo doctor may instead boil the two raw drugs into a tea, called a decoction.
It is often supplied as a small add-on dose to be taken along with another Kampo formula, rather than on its own.
Both parts are old. Gypsum and balloon flower root each appear in classical Chinese medical texts from around the second and third centuries, and both passed into Korean and Japanese practice.
The pairing under the name Kikyosekko is Japanese. It became a standard throat add-on in Kampo practice and is still listed today as a covered Kampo product in Japan.
Some reactions to Kikyosekko need urgent care. Call your local emergency number or go to an emergency department straight away — do not wait to see whether it passes.
Call emergency services if you cannot breathe, cannot swallow your own spit, are drooling, or your voice has gone muffled. These can mean the airway is closing.
See a doctor the same day if your throat swells more on one side, you cannot open your mouth fully, your neck is stiff, or you have a fever above 38.5C with a rash.
Book a normal appointment if a sore throat has not improved in three days, a cough lasts more than three weeks, or you feel very thirsty, weak or confused while taking this remedy.
Evidence grades and traditional-use labels are explained in our methodology. Nothing here is medical advice.
What it is typically used for, usual dose, cautions, and the study behind it where real trial data exists.
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