Organon §165

A medicine that shares common but not characteristic symptoms with a disease is not homeopathic to the disease.

But if:

1. there is nothing among the symptoms of the selected medicine that is in exact similarity to the distinguishing (characteristic), exceptional, uncommon symptoms of the disease case,

2. the medicine corresponds to the disease in question only in general, indeterminate states (e.g. , nausea, lassitude, headache, etc.) and not in more closely designated ones, and

3. among the known medicines, there is no more homeopathically fitting one to be found, then the medical-art practitioner has no directly advantageous result to promise himself from the employment of this unhomeopathic medicine.