def. seems way off to me, i cant really woute anything off the top of my head but id say trust me and stick witha 2 -3 day half life although ive seen it as a 5 day half life but never n ething less then 48 hrs
You did say the book ..... but I don't care if its the pdr, I still say its still wrong. In fact the primary reason why T4 is rx'd instead of T3 is precisely because you need to dose T3 throughout the day to maintain steady blood levels. As a result, T3 is in fact actually dosed *multiple* times a day. Don't take my word for it...go the thyroid usenet group, they'll give you an earful. As most any hypothyroid patient who supplements with cytomel or armour will tell you. See eg http://jcem.endojournals.org/cgi/content/full/82/3/765 which I just happened to have open. If you look at medline you will find many other articles referring to this rapid elimination. See eg http://www.ncbi.nlm.nih.gov/entrez/...e&db=PubMed&list_uids=11786691&dopt=Abstract. The very rapid onset of T3 and absorption within hours is really very well known.