How should we handle a customer complaint about the quality of a medicine?

Customer complaints are an important part of the Quality Management System and must be handled seriously and systematically. The standard process is as follows: 1. Record the details: regardless of the channel through which the complaint is received (telephone, email or in person), create a formal complaint record immediately, setting out in detail the complainant’s information, drug name, batch number and specific complaint (such as damaged packaging, unusual colour or foreign matter). 2. Initial assessment: a designated person (usually from the quality department) conducts an initial assessment of the seriousness of the complaint. If a potentially serious safety risk is involved, immediate quarantine of the relevant batch may need to be considered. 3. Investigation: investigate the complaint thoroughly. This may include checking retained samples from the same batch, reviewing production or distribution records, and interviewing relevant personnel to identify the root cause. 4. Take action and respond: take appropriate corrective and preventive action (CAPA) based on the investigation findings. A formal written response must also be provided to the customer within a reasonable time, setting out the investigation findings and the actions the company will take. The entire process must be fully documented.