There can be rebound but it can all depend on you, each person is different. I was on adex eod but I switch to aromasin because it has so many positive effects. Should not be rebound with aromasin.
I borrowed this:
"I would choose Aromasin....whether on cycle or PCT.
Aromasin will raise your natural test production and has a favorable affect on Sex Hormone Binding Globulin as well.
Aromasin lowers estrogen blood levels by 80%. Raises test by 60% lowers bad cholesterol and raises good cholesterol along with raising IGF-1 levels...find another aromatrase inhibitor that does this..
In a study, Aromasin had no effect on on the AR and testosterone levels but at a dose of even .5mg, it showed the ability to decrease SHBG and increase LH and FSH.
**broken link removed**
Also... aromasin dose is not as affected as its primary affinity is for peripheral aromatase (wherein because of tissue affinity, letrozole and arimidex highly suppress glandular estrone synthesis at low doses and more is needed for peripheral aromatase suppression- because of the nature of action as well) -Macro "
This is from research stop:
"As I posted, Arimidex is better at inhibiting sulfatase than it is E2. Your worry for the most part is E2 (estradiol). Also Arimidex competes with testosterone for the aromatase as a way of inhibiting the conversion you would get from aromatase. Because it competes and leaves the aromatase alive, so when you come off you get a flood of estrogen, or rebound.
Aromasin does not compete. It's suicidal. It attaches to the aromatase and kills it. In doing so it does a much better job of reducing E2 AND there is no rebound when you come off of it because it's killed the aromatase".