Hi Joaniepat, I have no peer reviewed references, but about six years ago I had to take a course of Fluconazole alongside my hrt and I experienced bleeding and flushing. My then doctor suggested the Fluconazole could have interfered with the levels of estradiol in my system. I should have put “ may affect the efficacy levels” in my previous post.
A drug interaction website states this
Interactions between your drugs
Moderate
fluconazole estradiol
Applies to: fluconazole, Estradiol Patch (estradiol)
Using fluconazole and estradiol together may alter the levels of estradiol in your body. This combination may cause nausea, vomiting, or vaginal bleeding. If you take both medications together, tell your doctor if you have any of these symptoms. You may need a dose adjustment if you take both medications. It is important to tell your doctor about all other medications you use, including vitamins and herbs. Do not stop using any medications without first talking to your doctor
“