Good Manufacturing Practice (GMP) is a set of rules and guidelines for the manufacturing industry. GMP helps ensure that products are safe, effective and reliable by providing standards for the design, testing, production and other aspects of manufacturing. The main risks are: unexpected contamination of products, causing damage to health or even death; incorrect labels on containers, which could mean that patients receive the wrong medicine; insufficient or too much active ingredient, resulting in ineffective treatment or adverse effects. GMP covers all aspects of production; from the starting materials, premises and equipment to the training and personal hygiene of staff.