Thanks for the comments.
Eli, the first article you referenced is by Katherine Zeratsky of the Mayo Clinic Staff. The second article references her on the caffeine/diuretic effect connection. The Zeratsky article answered my question after I did some research on caffein in tea and some simple calculations.
Zeratsky wrote that caffeine has a diuretic effect if you consume large amounts of it - more than 500 to 600 milligrams a day.
Linda, two 8 fl. oz. cups of drip coffee has 290 milligrams of caffeine.
Sixty fl. oz. of iced tea has 353 milligrams of caffeine.
So, both two 8 fl. oz. of coffee or 60 fl. oz. of iced tea are well below the 500 milligram/day limit and should not have a diuretic effect.
Linda, she tried one brand of decaffinated tea and didn't like it. Since the operation, I've found that she doesn't like a lot of food.
Willow, thanks for the comment on dehydration and the diuretic. I hadn't thought of that, although the nurse may have mentioned it.
The chemo is GemCis.
My wife puts 1 packet of sugar and 1 pink package of sweetener in a large glass of ice tea. I'll try and get her to switch to all sweetener.
I'll discuss this with the oncology nurse when we see her tomorrow. The oncologist never told her to stop drinking ice tea, but if the nurse insists, we'll bring it up with the oncologist.
Thanks again for your comments. They helped a lot.
Please be advised that any advice or information in my posts is my personal opinion only and is not intended nor implied to be a substitute for professional medical advice. ALWAYS seek the advice of your physician or other qualified health care provider.