I was on MDL...microdose Lupron...so I'm not sure if that had anything to do with it but I only hot flashed while taking the injection. Same thing with Menopur, when I would give myself the injections I'd have to take my sweater off and put the fan on , LOL
For me, most side effects didn't hit until the progesterone, now thats a doozy, LOL
Good luck :)