Most of the homeopathic medicines are
prepared by diluting an active material by a process called
potentisation/trituration. It retains essential quantities and removes
toxic.
Homeopathic medicinal source
Most homeopathic
medicines are made from a medicinal substance in double-distilled
water, study shows water has many mysterious properties enabling the
medicinal substance to solely infiltrate the water. And the medicinal
solution is usually preserved in an 87% water/alcohol solution.
Potentisation | Trituration

Homeopathic
medicinal substance is diluted, by 1 part of the original medicinal
agent to 9 or 99 parts double-distilled water or alcohol or lactose.
The mixture is then vigorously shaken or grinded. The resultant is then
diluted again by 1:9 or 1:99 and vigorously stirred or grinded. This
process of diluting and stirring or grinding is repeated 3, 6, 12, 30,
200, 1,000, or even 1,000,000 times. Stirring is performed for liquids
and grinding is performed for solids.

It is inappropriate to say
that homeopathic medicines are extremely diluted; they are not diluted
but extremely "potentized”. Potentization refers to the specific
process of sequential dilution with vigorous stirring. The theory is
that each consecutive dilution with vigorous shaking/stirring
infiltrates the new double-distilled water and imprints upon it the
fractal form of the original substance used (fractal refers to the
specific consecutively smaller pattern within a larger pattern).
Homeopathic remedies for diseases