Educational information, not medical advice — ask your doctor or midwife.
Bacillus Proteus is a single homeopathic remedy, not a mix. Its Latin name is Proteus vulgaris. It is also known as the Proteus bowel nosode, one of the Bach-Paterson bowel nosodes.
It is made by diluting the source germ again and again. Each step is shaken hard.
At the common 30C strength, no source material is left in the dose. What you take is sugar pellets, or water with alcohol.
Homeopaths reach for it when a person seems tense and prone to cramps. The usual targets are belly spasms, jumpy nerves and sudden temper. Long use in a tradition is not proof that a remedy works, and that point is not repeated later in this page.
Here is the plain verdict. No human trial shows Bacillus Proteus doing more than a dummy pill. It is best seen as a tradition-based remedy with no proven drug effect.
No one has shown how it could work, because at 30C there is nothing left to act on the body.
Homeopathy rests on two ideas. The first is that a substance which causes a symptom can ease that same symptom. The second is that shaking and diluting make a remedy stronger, not weaker.
Known chemistry does not support the second idea. Some homeopaths say the water keeps a trace or a pattern of the germ. No test has shown such a pattern doing anything in a person.
When people feel better, time, rest, care and belief explain it well. That is a real comfort, but it is not a drug effect.
It comes in a few simple forms.
Small sugar pellets that melt under the tongue are the most common. Liquid drops in water and alcohol are next. Some makers press it into tablets.
Strengths are written as 30C, 200C or 1M. Higher numbers mean more dilution, not more drug. Some homeopaths use LM strengths, which are drops taken more often.
Edward Bach studied gut germs in London in the 1920s. He made remedies from them before he moved on to his flower drops.
John Paterson and Elizabeth Paterson carried the work on in Glasgow in the 1930s. They built a small set of remedies from gut germs and called them bowel nosodes.
Paterson tied Proteus to sudden strain: cramps, spasm and quick temper. Bowel nosodes are still a small corner of homeopathy, and many homeopaths never use them.
See a doctor if belly pain is severe, or if it lasts more than a day or two.
Get care the same day for a fever above 38C (100.4F), blood in your stool, black stools, or vomiting that will not stop. Do the same if a child or an older person cannot keep fluids down.
Go to an emergency room for a rigid, board-like belly, fainting, or pain that comes on suddenly and hard. Do not wait to see if the remedy helps.
Evidence grades and traditional-use labels are explained in our methodology. Nothing here is medical advice.
Reviewed by the HealisticMD editorial team How we grade evidence →
The published evidence for Bacillus Proteus is weak or absent. That usually means no controlled trial has tested it, not that a trial found it ineffective — the two are different, and we grade only what has been published.
What it is typically used for, usual dose, cautions, and the study behind it where real trial data exists.
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