What are master formulas?

The magistral formula allows the preparation of a drug by or under the direction of a pharmacist, in order to expressly fulfill a detailed medical prescription of the active ingredients it contains. All according to the norms of correct elaboration and quality control established for this purpose, dispensing in the office or pharmacy and with the due information to the user according to the terms established in the national formulary.

To whom is the master formula addressed?

The magistral formula is aimed at those people who, in some circumstances and clinical situations, do not have the industrialized drug they need.

It improves the process of using the drug by adapting it to the patient’s characteristics, thus facilitating adherence to treatment.


Personalized attention
Individualized treatment
Use of non-marketed active ingredients
Ideal for allergy sufferers (excludes perfumes, preservatives, etc.)

Possible uses of the magistral formulation

Filling therapeutic gaps
Drug shortages or recalls
Facilitation of patient administration
Reduce the risk of adverse reactions
Therapeutic needs of people without commercial options
Elimination or substitution of excipients due to allergies, poor tolerability, interactions, interference with analysis or physical-chemical incompatibilities with other products.

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