See "Elimination" page 11.
http://www.gilead.com/~/media/Files/pdfs/medicines/liver-disease/harvoni/harvoni_pi.pdf
I have been curious about the half life as well but had difficulty finding a source do you have a link to that information?
Thanks
Lynn
Apparently, the half life of Harvoni is 47 hours. There doesn't seem to be a
requirement to use birth control on Harvoni if not using Ribavirin. So it appears that Harvoni leaves your body relatively quick.
I sure wouldn't want to take the chance of getting pregnant while taking drugs
like Harvoni. Seems it doesn't come out till much later that there are issues.