definitions - understudies. understudy (n.) 1.someone who takes the place of another (as when things get dangerous or difficult)the star had a stand-in for dangerous scenes we need extra employees for summer fill-ins. 2.an actor able to replace a regular performer when required. understudy (v.)
Radiation can come in the form of a pill. Iodine (131 I) used in thyroid treatment might be given in pill form or as a liquid. The choice is an institutional decision based on many factors, including the amount to be given to a patient.
If the goiter is caused by hyperthyroidism, you may be treated with radioactive iodine, which is given as a pill and causes the thyroid gland to shrink and make less thyroid hormone. Radioactive iodine is only absorbed by the thyroid gland, so it does not harm other cells in your body.