Exemestane is the base drug name. Aromasin was the original brand, and all others are generic brands. It can make you feel a bit queasy, so taking it with food can help prevent that. Generics are meant to have identical amounts of the base medication but sometimes will have slight differences in the binding agents, & other components. For this reason with my "important" medications, like my exemestane, I insist on not having generics. Often pharmacies will change the generic brands depending on what they can get for the best price for them. The government keeps trying to tell us that we'll pay less for generics, but generally, you're still paying the PBS price of $37.70, regardless. I don't like the switching of brands. One of my "less important" medications recently the pharmacy had a change in their generic. I don't think it's any less effective, but it has a bitter taste that the other brand never had.
After that essay, I hope I've been some help.
Take care
Lyn