18.—(1) Subject to paragraph (2), no person shall supply a controlled drug otherwise than in a bottle, package or other container which is plainly marked—
(a)in the case of a controlled drug other than a preparation, with the amount of the drug contained therein;
(b)in the case of a controlled drug which is a preparation—
(i)made up into tablets, capsules or other dosage units, with the amount of each component (being a controlled drug) of the preparation in each dosage unit and the number of dosage units in the bottle, package or other container;
(ii)not made up as aforesaid, with the total amount of the preparation in the bottle, package or other container and the percentage of each of its components which is a controlled drug.
(2) Nothing in this regulation shall have effect in relation to—
(a)the drugs specified in Schedules 4 and 5 or poppy-straw;
(b)any drug specified in Schedule 3 contained in or comprising a preparation which—
(i)is required for use as a buffering agent in chemical analysis;
(ii)has present in it both a substance specified in paragraph 1 or 2 of that Schedule and a salt of that substance; and
(iii)is premixed in a kit;
(c)any exempt product;
(d)the supply of a controlled drug by or on the prescription of a practitioner;
(e)the supply of a controlled drug for administration in a clinical trial or a medicinal test on animals.
(3) In this regulation, the expressions “clinical trial” and “medicinal test on animals” have the same meanings as in the Medicines Act 1968.