There are usually no special precautions to observe for radiopharmaceuticals when they are using in small amounts for diagnosis.
Some radiopharmaceuticals may accumulate in your bladder. Therefore, to increase the flow of urine and lessen the amount of radiation to your bladder, your family doctor may instruct you to drink plenty of liquids and urinate often after certain tests.
For diseaseds receiving radioactive iodine - iodohippurate sodium I 123, iodohippurate sodium I 131, iofetamine I 123, iothalamate I 125, radioiodinated albumin, or radioiodinated iobenguane :