A process for cleaning reusable canisters known as pigs which contain radioactive drugs and may contain residual radioactive material and other contaminants. Those pigs that are contaminated with radio-active material are removed from the cleaning process until they have decayed to the background radiation level, cleaned and disinfected. Within a very clean drug preparation area a radioactive drug is inserted into the pig and the pig is placed in a protective outer container. At a treatment site the outer container and pig are delivered to a clean treatment area where the pig is removed from the outer container and the drug is removed from the pig and utilized.