Radiopharmaceuticals must be packaged appropriately to take on flights
Nowadays, there are numerous cancer treatments available, but chemotherapy and radiation are still the most common ones. Radiation therapy can be internal or external. Those who are treated with the internal type, like this person, are commonly prescribed radiopharmaceuticals.
These are drugs that deliver radiation directly and specifically to cancer cells. Although it is a treatment, the pills are still radioactive, which is why they must be packaged in special containers to make sure that they do not pose a threat.