I had Thrush once, and when I swallowed, it felt as if I was swallowing broken glass. Awful, and brings tears to my eyes just thinking about it!
As a transplant recipient, I am taking immunosuppressant meds. I also have an albuterol inhaler to control diagnosed Exercise-induced asthma.
My throat was sore after a long flight home, after a trip to high elevations in one of the National Parks where my husband and I spent days on the trail. I had incorrectly decided that my sore throat would go away after a few days of rest and hydration. MY 'self diagnosis' was wrong and as always happens, it was worse at night . So I went to the ER, where the nurse said that the cool dry air, the altitude, and the additional need for the inhaler while hiking had created a 'Perfect Storm' scenario for the thrush to develop. I was prescribed the Nystatin in the oral swish-in-mouth for 5 days. After 5 days I went to my PCP to get it checked, and he prescribed another 10 days. It went away, and have not had another incidence of it since.
I notified my transplant dept of the medication as soon as it was prescribed. I don't recall the incident having any effect on my labs.