
Isopathy is a subset of homoeopathy. It was invented by Johann Lux in the 1830s.
It differs from homeopathy in general in that the remedies are made up either from things that cause the disease or from products of the disease such as pus. These are referred to by
isopaths as nosodes and are subdived into auto-nosodes and sarcodes. Many so-called homeopathic vaccines are in fact a form of isopathy.
Of course for non-homeopathic-admirers the criticisms who applies to homeopathy applies too to isopathy.