The Fukushima Daiichi Nuclear Power Plant (FDNPP) Accident happened in Fukushima prefecture in March, 2011 and various efforts have been carried out to prevent health damage, including thyroid cancer, caused by radioactive-iodide. In this present report, we tried to discover whether stable-iodide for the prevention against the development of thyroid cancer was properly administered to radioactive-iodide-exposed persons or not. Since pharmacists play an important role in the treatment of stable-iodide, we investigated how the pharmacists in Fukushima contributed to the treatment of stable iodide in the FDNPP accident. In addition, we introduce a new revised method for the treatment of stable iodide published by the Nuclear Regulation Authority, discuss the important role of pharmacists in the Nuclear Power Plant Accident, and propose possible ways of preparation to protect the health of citizens.