I've been using Imvaggis since last October when I started systemic HRT. I wanted something low dose as Ovestin was causing discomfort. I also wondered if the excipients in the creams were the real cause of the problem too.
Anyway instead of switching to a generic estriol cream and using less of it, I thought I'd try Imvaggis as it's a hard pessary made of fat - can't remember if it's soya oil or peanut oil as the base so if you're allergic or sensitive to either this won't be the answer.