Regulation 21

The label of a container of a preparation which contains a poison as one of the ingredients shall include a statement of the proportion, whether stated as a percentage or not, which the poison bears to the total ingredients of the preparation, and where the proportion is stated as a percentage, the container shall be so labelled as to indicate whether the percentage is calculated on a basis of weight in weight, weight in volume or volume in volume.

In the case of a preparation containing a poison specified in the first column of the Fourth Schedule, it shall be sufficient to state on the label the particulars specified in the second column of that Schedule against the description of the poison.

In the case of a preparation derived from nux vomica or from opium and containing one or more alkaloids of nux vomica or of opium named in the Poisons List, it shall be sufficient, so far as these alkaloids are concerned, to state on the label the proportion of strychnine or of morphine, as the case may be, contained in the preparation.

In the case of a preparation in the British Pharmacopoeia or the Formulary of the Pharmaceutical Codex which is named in accordance with rule 20(3) it shall not be necessary to state on the label the proportion of poison contained in the preparation, and in the case of any dilution or admixture of such a preparation, it shall be sufficient to state the proportion which the preparation bears to the total ingredients of the dilution or admixture.

Where the poison is in tablets, pills, cachets, capsules, lozenges or similar articles, or in ampoules, it shall be sufficient if the label of the box or covering in which the articles are enclosed states the number of the articles and the amount of the poison, or in the case of such a preparation as is mentioned in paragraph (4), the amount of the preparation contained in each article.