X-ray Inspection Basics in Pharmaceutical Production

Learn How X-ray Technology Helps Improve Quality and Supports Compliance in Pharmaceuticals

Learn all about x-ray inspection basics in pharmaceutical production in this useful know-how page from METTLER TOLEDO.

X-ray inspection reveals what the human eye cannot see. It can verify the contents of a package to make sure the correct product is present, the accurate number of products is in the package, and any components such as patient safety information or leaflets are included.

X-ray inspection systems also detect physical contaminants such as glass, metal, or dense plastic that may enter the product during production and packaging. By identifying contaminated or defective products before they are released, these systems help manufacturers reduce the risk of recalls, comply with pharmaceutical regulations, and help protect patients and brand reputation.

Download our infographic to learn more about x-ray inspection basics in pharmaceuticals.

Pharmaceutical packaging errors are often small, but their consequences can be significant. A missing tablet, an incomplete kit, or a damaged pack can lead to rejected batches, warning letters or patient complaints.

In pharmaceutical production, x-ray systems are primarily used to verify the contents of a package. This can be checking for the presence of tablets in a blister pack, confirming the correct assembly of a medical device, or verifying the completeness of a sealed carton. These checks are critical to help protect patients and to help manufacturers comply with pharmaceutical validation standards and regulations such as 21 CFR Part 11, 21 CFR Part 211, and current Good Manufacturing Practice (cGMP) worldwide.

Man looking at x-ray image of blister packs

How Does X-ray Inspection Technology Work?

X-ray inspection measures differences in the absorption of x-rays as they pass through products. High performance systems combine advanced imaging, high sensitivity, and reliability to automatically reject defective products. They are integral to helping to maintain product safety and proving due diligence throughout the production process.

X-ray inspection can go beyond contamination detection to further enhance quality control processes through:

Component checks – to make sure patient safety leaflets or other components are present
Monitoring fill levels – to verify the number of tablets in a blister pack or the amount of liquid in a vial
Measuring mass – to confirm packages are the correct weight
Identifying missing or broken pieces – to check product and package integrity

Which Types of Pharmaceutical Products Can Be Inspected?

X-ray inspection is highly adaptable. In pharmaceutical and medical device applications, x-ray systems are used to inspect a wide range of packaging types and sizes. These include:

Blister packs
Injection pens
Cartons
Bottles
Vials

X-ray image of blister pack with missing pill

Where on the Pharmaceutical Line Can X-ray Inspection Be Installed?

X-ray inspection systems can be installed at key stages in production. For example, with sachets or blister packs, x-ray systems can check that the correct number of pills or the right amount of powder is present prior to secondary packaging.

For tablets and capsules, x-ray systems can detect missing or broken units within blister packs, bottles, or cartons. X-ray inspection is also commonly used to identify open flaps, damaged packaging, or incomplete secondary packs.

Medical devices are inspected in a similar way. Injection systems and needle-based delivery devices, for example, can be checked to confirm the presence and correct assembly of critical components before distribution.

Manufacturers often use multiple x-ray systems throughout production to detect and remove any products containing foreign materials. This helps enhance patient safety, boosts efficiency, and supports compliance at every stage in the production process.

Additional Benefits of X-ray Inspection in Pharmaceutical Production

Automatic rejection of substandard items keeps production lines running smoothly, and digital records of inspection results simplify audits and traceability. By combining compliance with efficiency, x-ray inspection systems support continuous improvement and help manufacturers deliver high-quality pharmaceuticals every day.

Proven x-ray inspection solutions from METTLER TOLEDO help pharmaceutical manufacturers:

Inspect every product for package integrity and completeness.

Protect patients, equipment, and brand reputation by removing damaged or substandard products from the production line.

Comply more efficiently by supporting validated processes, documentation needs, and audit readiness.

X-ray inspection plays a vital role in modern pharmaceutical production. It identifies defective or substandard products, supports compliance with global standards, and helps protect patients from missing or damaged pharmaceuticals.