The dose of each active substance is defined as :
1° either its weight per unit of intake determined ;
2° or its centesimal proportion by weight in the preparation; or
3° or, in the case of a product titrated in biological units, the number of units contained per dosage unit, per cubic centimetre or for a given quantity by weight of the product, with the definition of the biological unit used if this definition is necessary to determine the activity of the medicinal product.