While going OT here, it remains an interesting topic so I will split it off. Generics are usually a ‘win’ and I normally buy them, but are not always.
My web survey (re)confirms generic fexofenadine hcl (in the largest boxes) can be 54% MORE expensive to 10% LESS expensive than the brand once the annually offered rebate is taken into account (not counting postage when applicable). In small packets the generic can be half the cost but when you use a med why ever buy a small packet because of the absurd unit cost for either brand or generic, in comparison to the large box?
The equation shifts a bit depending on where you buy each and whether you walk by the chemist regularly, need to make a special trip (petrol), or need to have it posted, and whether there is a rebate on 
