Don't Give Lysix First or Pherosamide First or Both?

Thiazide first and then pherosamide or the other way around. Give them both. Lysix has a half life of six hours, metallosin has ahalf life of 20, 40, 40 hours,. It'll hang around. Okay. Now, what role if any does calculating a phena have now? I know you can't do it if you're giving lysix. You can do a fractional excretion of urea. But that's not enough to figure out what's going on with the patient. So, personally, I don't use it. And based on the urine examination, physical exam, I think that's enough to make a determination