influenza
"On day two and definitely feeling better.  My wife caught the flu a day or two before me so I knew what was coming.  Got tamiflu withing 24 hours of onset.  I can feel symptoms strengthening as I get 10 or so hours after dose (dosing every 12 hours).  Not a miracle but anything that that makes this hellish flu less horrible is very, very welcome indeed.  No stomach problems."