What is Blatta orientalis?

Blatta orientalis is a homeopathic remedy made from the Indian cockroach. It is also called the oriental cockroach. Homeopaths give it mainly for asthma and for chesty, bronchitis-type breathing trouble.

They use it most for wheezing with thick mucus. It is a single remedy, not a blend.

To make it, the insect is soaked in alcohol. That gives a starting liquid. The liquid is then watered down step by step, with hard shaking at each step.

30C is one of the common strengths sold. At that point the mix has been watered down so far that almost none of the insect matter is left in the pill or drop you take.

The evidence verdict is simple. Careful human trials cannot tell remedies like this apart from placebo (a dummy treatment). We could not find any published human trial of Blatta orientalis itself.

It does have a long standing inside homeopathy, going back to the 1890s. But long use is not proof that something works, and that point is made here once for the whole page. Treat this as a comfort measure people choose, not as asthma treatment.

Asthma can kill. If you use this remedy at all, use it alongside the inhalers and tablets your doctor prescribed. Never use it instead of them.

How does Blatta orientalis work?

There is no accepted way this remedy could work in the body. That is the honest starting point.

Homeopathy rests on the idea of "like cures like". A substance that causes symptoms in a well person is said to ease those same symptoms when watered down a lot.

Cockroach droppings and body parts are a real, well-known asthma trigger. That is the thinking behind the choice of this insect.

The problem is the dilution. Above about 12C, no molecules of the starting substance are left. So a drug-like effect on the body is not possible.

Ideas such as "water memory" have no backing from chemistry or physics.

Some people do feel better after taking it. The likely reasons are:

- the placebo effect - the calm and care of a long, unhurried visit with a homeopath - the natural ups and downs of asthma - the prescribed medicines they are taking as well

What forms does Blatta orientalis come in?

It is sold in just a few standard homeopathic forms.

- Sugar pills or pellets, dosed with the watered-down liquid - Liquid drops in a base of alcohol and water - Common strengths: 3X, 6C, 30C and 200C - Mother tincture (sometimes marked Q or theta), which still holds insect matter and is rarely sold to the public

Strength labels in homeopathy do not mean dose in the usual sense. A higher number means more watered down, not stronger in any way you can measure.

Where it comes from:

Blatta orientalis came into homeopathy in Bengal, India, in the late 1880s. It is credited to Dr D.

N. Ray.

The story often told is about a man with asthma. He drank tea in which a cockroach had been boiled, without knowing it, and got better.

Ray went on to prescribe it for asthma. It was written up in homeopathic journals and materia medica of the time.

Since then it has stayed a standard asthma remedy in homeopathic practice, above all in India.

That is its whole traditional record: about 130 years inside one system of medicine. It has no use in Ayurveda, Chinese medicine or Western herbalism.

What does Blatta orientalis help with?

• Asthma with wheezing: This is the main traditional use, and the evidence does not back it. Homeopaths choose it for wheezy, mucus-heavy asthma, often in heavier-built people or those who react to dust and damp. We found no published human trial of this remedy for asthma, and reviews of homeopathy for chronic asthma have not shown a benefit over placebo. Keep taking your prescribed inhalers.
• Bronchitis with cough and thick mucus: Traditional homeopathic use only. Practitioners pick it when a cough brings up thick, sticky phlegm and the chest sounds rattly. No human trial supports this. A cough with fever, or one lasting more than three weeks, needs a doctor rather than a remedy.
• Breathlessness that feels worse in damp or dusty air: A classic prescribing picture in homeopathic texts, not a tested claim. Damp and dust are real asthma triggers, so reducing exposure may help you; the remedy itself has no tested effect on this.
• Allergy-linked cough: Used traditionally when coughing follows exposure to dust or insects. There is no trial evidence. Note the irony worth knowing: cockroach protein is a genuine allergen, so the low-dilution forms could in theory worsen an allergic cough rather than settle it.
• Chest tightness in people who react to house dust: Homeopathic tradition only, with no supporting human studies. Chest tightness that comes on suddenly, or that does not ease with your reliever inhaler, is a reason to get urgent medical help.

What are the side effects of Blatta orientalis?

• Allergic reaction to insect protein in low strengths or the mother tincture: itching, rash, wheezing
• Worsening wheeze or chest tightness after a low-dilution dose
• Stomach upset or loose stools from the lactose (milk sugar) in the pills
• Effects from the alcohol in liquid drops, which matters for children and for anyone avoiding alcohol
• A short flare of symptoms that homeopaths call an aggravation
• Delay in getting proper asthma treatment, which is the most serious risk here

Good to know:

At 30C and above, the pills are sugar and the drops are dilute alcohol, so direct side effects are very unlikely.

The two risks that matter are different. First, low strengths and the mother tincture still contain cockroach protein, a known trigger of allergic asthma. Second, and more important, people sometimes lean on the remedy and cut back on their inhalers.

Uncontrolled asthma can become life-threatening within hours. That risk comes from what gets left out, not from what is in the bottle.

How much Blatta orientalis should you take?

• Recommended daily: No dose has been set by trials. No trial of this remedy has ever tested one. Here is what homeopaths often suggest, for information only: - 3 to 5 pills of a 30C strength, one to three times a day - Or 5 to 10 drops of the liquid in a little water - Lower strengths such as 6C are often given more often - Higher strengths such as 200C are given much less often Strengths at or below 6X still hold insect matter. They carry a real allergy risk. Avoid them unless a trained practitioner has told you otherwise and you know you are not allergic.
• Best time of day: No time of day is better. Homeopathic custom is to take pills away from strong flavours, such as coffee, mint toothpaste or menthol. There is no evidence that these matter.
• With or without food: It is usually taken between meals, about 15 to 30 minutes before or after food. This is custom, not a tested rule.
• Time to effect: There is no reliable answer. The remedy has not been tested against placebo in people. Any change in the first few days is most likely your own condition shifting, or the placebo effect.
• How long to take it: Homeopaths usually review after two to four weeks. Has your breathing stayed the same, or got worse? Then stop and see a doctor, rather than moving to a different strength. Do not let a trial of this remedy drag on for months while your asthma control slips.