Various scales of potentization — the first-year Pharmacy chapter, as a study grid

Some chapters on the syllabus sheet look short but hide a lot of work. This is one of them. Chapter twelve of first-year Homoeopathic Pharmacy has just one topic line. But that one line asks eighteen questions.

The NCH syllabus calls the chapter “Various Scales of Potentization in Homoeopathic pharmacy”. It sits in HomUG-HP, the code for first-year Pharmacy. This piece shows you how to read the line and turn it into a study grid.

First, the words

Potentization is the step-by-step process by which a homoeopathic medicine is prepared from its starting material. You will also see it spelt “potentisation”. The syllabus uses both spellings in different chapters. They mean the same thing.

A scale is a system for doing that process. Each scale has its own ratio, its own steps and its own way of being written. There is more than one scale, which is why the chapter says “various”.

The one long line

Here is the full topic, as the sheet prints it:

“History of development, Introducer, Designation, Preparation, Administration & Application with respect to – Centesimal Scale, Decimal Scale & 50 Millesimal Scale.”

Read it as two lists joined by “with respect to”. The first list has six headings. The second list has three scales. You learn every heading for every scale. Six times three is eighteen.

The three scales

• Centesimal Scale. “Centesimal” comes from a Latin word meaning hundredth.
• Decimal Scale. “Decimal” comes from a Latin word meaning tenth.
• 50 Millesimal Scale. “Millesimal” means thousandth. The “50” is part of its name.

The names carry a clue about the ratio each scale uses. Your textbook gives the exact ratios and steps. Learn them from there, and check that you can explain how the name and the ratio fit.

The six headings

Now the six things you learn about each scale.

1. History of development. How and when the scale came into use.
2. Introducer. The person who introduced it. The sheet asks for the name but does not give it. Your textbook does.
3. Designation. How a potency on that scale is written. Each scale has its own way of marking a potency, with numbers and letters.
4. Preparation. How a potency on that scale is made, step by step.
5. Administration. How a preparation on that scale is given.
6. Application. Where and why that scale is used.

Build the grid

Draw a table with three columns, one for each scale. Give it six rows, one for each heading. That makes eighteen boxes.

Fill it in as your teachers cover the chapter. Leave a box empty until you are sure of it. At revision time, cover one column and try to recall it. Then cover one row and compare the three scales side by side. The second way is often the more useful. Examiners like questions that ask you to compare.

Pay special attention to the Designation row. It is the one you will use most outside exams, because it is how potencies are written everywhere.

How this chapter sits in the year

First-year Pharmacy has thirty-two chapters. This is the twelfth. It comes after “Mother tincture and its preparation” and just before “Drugs Dynamisation”.

The two chapters around it matter. The mother tincture is often where preparation starts. Dynamisation, the next chapter, covers the wider idea behind potentization, along with succussion, trituration and the many named types of potency. Read this chapter and the next as a pair.

It also links forward. Chapter fifteen, “Posology”, has a topic on selecting a potency. You cannot understand that topic until you know what the scales are. And chapter five, “Weights and measurements”, is the arithmetic under every scale.

What to take from it

First, read the long topic line as six headings times three scales.

Second, build the eighteen-box grid and fill it from your textbook.

Third, learn designation carefully for each scale.

Fourth, read this chapter together with “Drugs Dynamisation”.

The sheet gives the headings and the three scale names. It does not give the history, the introducers or the ratios. This piece explains the structure. The facts inside each box come from your textbook and your teachers.

Where to go next on the platform

This piece sits in the first-year Homoeopathic Pharmacy room, beside the piece on “Drugs Dynamisation”. “Vital force, dynamization, cure and drug proving — a first-year Organon chapter”, in the first-year Organon room, gives the Organon side of the same idea. For a plain explainer meant for any reader, “What ‘potency’ means on a homoeopathic bottle” is in the Homoeopathic Pharmacy topic of Homoeopathy Knowledge.