The medical facility where the RIT treatment is performed will provide you with instructions for special care to be taken at home, including important steps to take immediately afterwards, and in the days and week following treatment. These instructions can vary between different facilities, and you should refer to the treating facility to give you more details.
Generally, one can return to work right after treatment, unless otherwise specified by the treating facility. There may be additional medications that may need to be adjusted or stopped temporarily prior to and after treatment, such as blood thinners, and this will be instructed by your medical provider.