What is Gokoto?

What is Gokoto, and why is it restricted?

Gokoto is a Japanese Kampo medicine built around ephedra and licorice. Both carry real risk. In Japan it is a prescription medicine, given out by a doctor or pharmacist.

Ephedra holds ephedrine-type alkaloids. These act in the body much like adrenaline. In people they can raise blood pressure, speed up the heart, and set off an abnormal heart rhythm.

Licorice brings a second, slower danger. With repeated use it can drop your potassium (a salt your heart and muscles need) and push blood pressure up. The formula also holds apricot kernel, which can release cyanide, a poison.

Evidence verdict: we found no good human trials of Gokoto itself. Its standing rests on long use in Kampo practice. Traditional use is not proof that a remedy works, and it is not proof that it is safe.

How does Gokoto work?

How does Gokoto act in the body?

The main driver is ephedra. Its alkaloids act on adrenergic receptors, the switches that adrenaline uses. In people, ephedrine of this type opens the airways and eases wheeze.

The same switches sit in the heart and blood vessels. So the wanted effect and the harm come from one action. Heart rate and blood pressure can climb together.

Licorice works a different way. Its glycyrrhizin blocks an enzyme that guards the salt balance system of the kidney.

In people this can cause low potassium, swelling, and raised blood pressure. Doctors call this pseudoaldosteronism (a salt and potassium imbalance).

Apricot kernel holds amygdalin. Gut bacteria can turn amygdalin into cyanide. Cyanide stops cells using oxygen, which is why large amounts of apricot kernel are dangerous.

Gypsum and mulberry bark were added by tradition to cool heat and calm a cough. There is no solid human proof for what these parts add. Any claim about them is based on practice, not on trials.

The stimulant effect of ephedra can start within an hour. The licorice effect is different. It builds quietly over days or weeks, and you may feel nothing until potassium is already low.

What forms does Gokoto come in?

What forms does Gokoto come in?

In Japan the usual form is a dried extract granule in a sealed sachet. Tsumura sells it as formula number 95, often written TJ-95. Other licensed Kampo makers sell their own version.

Some pharmacies also hold the five raw crude drugs. A trained pharmacist may dispense them against a prescription. This page gives no method for handling them.

A few over-the-counter Kampo cough products in Japan use the same formula name at a lower strength. They are still ephedra products. A pharmacist should check them against your health and your other medicines.

Outside Japan you may see the name on imported or online products. Those are often unlicensed. Strength, purity and even the true ingredient list can be unknown, so we advise against buying them.

Do not treat any of these forms as interchangeable. Two packs with the same name can differ in strength.

Where it comes from:

Where does Gokoto come from?

The formula is Chinese in origin. It appears as Wu Hu Tang, Five Tigers Decoction, in the Ming dynasty text Wanbing Huichun of 1587. It is a variation on an older ephedra and gypsum formula.

In classical practice it was given for a loud, forceful cough with wheeze and a feeling of heat. Practitioners matched it to a pattern, not to a disease name. It was seen as a strong, short-course remedy, not a daily tonic.

Japanese Kampo doctors took the formula up and kept it in use. When Japan added Kampo extracts to national health insurance in the 1970s, this one was included. It is still prescribed today, often for children with a barking cough.

That long record tells you the formula is established in the tradition. It does not tell you the formula is safe, and it does not tell you it works. Those are separate questions, answered by trials and by safety reports.

What does Gokoto help with?

• Cough with wheeze: This was the classic target. Practitioners chose it for a loud, tight cough with a feeling of heat. Modern proof is thin. We found no good controlled trial of the whole formula for cough.
• Asthma attacks in traditional practice: Ephedra was used for centuries to ease breathing. Ephedrine does open airways in people, so the effect is real at the ingredient level. Modern asthma care uses inhalers, which act faster and spare the heart. Never swap a prescribed inhaler for this formula.
• Acute bronchitis: Kampo practice used it for a short, noisy chest infection. Most acute bronchitis settles on its own. There is no strong human evidence that this formula shortens it.
• Childhood cough, as prescribed in Japan: Japanese doctors do prescribe it to children, at a dose they set. Children are more open to harm from stimulants. A parent must never start or buy this for a child.

Which foods are rich in Gokoto?

Gokoto is a medicine, not a food. But licorice in food matters here. Licorice sweets, licorice tea and some soy and confectionery products add to the same potassium risk, so tell your prescriber if you eat them often.

What are the side effects of Gokoto?

• Fast, pounding or irregular heartbeat
• Raised blood pressure
• Chest pain
• Jitteriness, tremor and anxiety
• Trouble sleeping
• Headache
• Nausea, stomach upset or loss of appetite
• Sweating
• Trouble passing urine, more likely in older men
• Low potassium from the licorice, which can cause muscle weakness and cramps
• Swelling of the legs, face or hands with sudden weight gain
• Rare but serious heart rhythm problems
• Rare stroke or heart attack, reported with ephedrine-type stimulants
• Rare severe muscle breakdown linked to very low potassium
• Allergic rash
• Liver injury, reported rarely with Kampo formulas

Good to know:

How serious is this, and how fast?

Two speeds of harm sit in one packet. Take both seriously.

The stimulant effects can start within an hour. A racing heart, chest pain or a bad headache after a dose is an urgent sign. Do not wait it out.

The licorice effects are slow and quiet. Low potassium can build over weeks with no warning. By the time you feel weak or swollen, it may already be marked.

Older people, children and anyone with heart, kidney or blood pressure trouble are at higher risk. So is anyone taking a water pill.

How much Gokoto should you take?

• Recommended daily: Why does this page give no dose? This page gives no dose, no amount and no way to prepare it. Gokoto is prescribed by doctors in Japan for good reason. The ephedra in it acts like adrenaline. A safe amount depends on your age, weight, heart, blood pressure and other medicines. Only a prescriber who has examined you can weigh that up. The licorice is a second problem. Its harm builds with time, not only with a large amount. Many people already take licorice in other Kampo formulas, in sweets or in tea, without knowing. A number copied from a website cannot account for any of this. It can only get you into trouble. If a doctor has prescribed it, follow the label and ask your pharmacist. Tell them every other medicine and supplement you take.
• Best time of day: Not applicable. Timing is part of a prescription, so we give none here.
• With or without food: Not applicable. Any instruction about food belongs on your prescription label, not on this page.
• Time to effect: Not applicable. We do not describe how fast it acts, because that invites self-dosing. Ask the prescriber who gave it to you.
• How long to take it: How long should it be taken? We give no duration. In Kampo practice it was a short-course remedy, stopped when the cough settled. Only your prescriber can set and review the length. The licorice risk grows the longer you take it. That is why long, unwatched use is the pattern most linked to harm.