Can aromasin (exemestane) boost testosterone ?

It's All Relative: This is a good "relationship" question (bet ya didn't figure that!). That drug decreases the conversion of testosterone to estrogens(mostly in that fatty tissues), so in that way whatever testosterone is around stays around longer, thus altering the testosterone/estrogen ratios. You could think of it as an increase of testosterone or a decrease in estrogens or both. Other people try to lose weight

Aromasin (exemestane): Aromasin (exemestane) does not increase testosterone level at the recommended dose of 25 mg /day. Some increase was noted with dose 200 mg or more /day as per prescribing information of aromasin (exemestane)

Not really!: It prevents its conversion to 17-beta-estradiol by blocking cyclic aromatase! This can therefore keep higher levels!