 
 <prompt> "The central part of an item or concept is called the nucleus. In the context of a cell, the nucleus is where the genetic material is stored and regulated. Similarly, in the context of an atom, the nucleus is where the protons and neutrons are located. Understanding the nucleus is crucial in comprehending the overall structure and function of various entities in the scientific world." <response>: For UK, na di Medicines and Healthcare Products Regulatory Agency dey approve drugs for use, but di evaluation dey done by di European Medicines Agency, wey be agency of di European Union based for London. Normally, approval for UK and other European countries dey come later pass USA own. After dat, na di National Institute for Health and Care Excellence (NICE), for England and Wales, dey decide if and how di National Health Service (NHS) go allow (in the sense of paying for) their use. Di British National Formulary na di main guide for pharmacists and clinicians. 