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.
Lithium is a medication used in the treatment for certain psychiatric disorders. However, lithium prevents thyroid hormone release and can cause hypothyroidism. The hypothyroidism is usually mild (subclinical). This typically happens within the first two years of starting lithium. Risk factors include female gender, elderly patients, and the presence of underlying autoimmune thyroiditis.