Zip Code 23803 Population. 23803 is located in the state of Virginia in the Richmond metro area. Zip code 23803 is primarily located in Chesterfield County. Portions of 23803 are also located in Dinwiddie County.The official postal service name used for 23803 is PETERSBURG, Virginia.ip Code 23803 Area Codes. 23803 is located in the state of Virginia in the Richmond metro area. Zip code 23803 is primarily located in Chesterfield County. Portions of 23803 are also located in Dinwiddie County.
Cytomel (T3) is rarely prescribed on its own to address thyroid problems; it is usually prescribed with T4. In the past, cytomel was a scheduled treatment for obesity; however, an increase in heart complications and cardiac stress forced withdrawal of T3 for that application.
Triiodothyronine, also known as T3, is a thyroid hormone. It affects almost every physiological process in the body, including growth and development, metabolism, body temperature, and heart rate.roduction of T 3 and its prohormone thyroxine (T 4) is activated by thyroid-stimulating hormone (TSH), which is released from the pituitary gland. This pathway is part of a closed-loop feedback process: Elevated concentrations of T 3, and T 4 in the blood plasma inhibit the production of TSH in the pituitary gland.