What is GMP?
The foundation everything else is built on.
Overview
In your own words, explain what Good Manufacturing Practice (GMP) is, who it applies to, and why it was developed. Imagine you are explaining it to a new colleague on their first day in a pharmaceutical company. They are smart but have no prior GMP knowledge.
Read before you answer
Good Manufacturing Practice (GMP) is a regulatory framework that ensures products are consistently manufactured and controlled to quality standards appropriate for their intended use. It was developed in direct response to historical disasters — most notably the 1937 sulfanilamide mass poisoning in the United States, where over 100 people died because a solvent was used without safety testing, and the thalidomide tragedy of the late 1950s, which caused severe birth defects when a sedative was marketed without adequate testing. These events demonstrated that relying on manufacturers to self-regulate was insufficient, and GMP regulations were created to mandate minimum standards.
GMP applies across pharmaceuticals, biologics, medical devices, active pharmaceutical ingredients (APIs), food, and cosmetics. In the pharmaceutical sector, the regulations are set and enforced by national authorities: the FDA in the United States (21 CFR Parts 210/211), the EMA in the European Union (EU GMP Annex guidelines), and the MHRA in the United Kingdom. International harmonisation is driven by the ICH (International Council for Harmonisation), particularly ICH Q10, which defines the Pharmaceutical Quality System framework and underpins how modern GMP is interpreted globally.
The core pillars of GMP are: qualified and trained personnel; premises and equipment that are fit for purpose and properly maintained; well-written and controlled procedures (SOPs); thorough contemporaneous documentation; rigorous quality control testing; validated processes and cleaning methods; and robust change control to manage modifications. Together, these pillars create a system where every batch produced is demonstrably safe, effective, and of consistent quality — and where any failure can be identified, investigated, and corrected.