I have never believed in anti perspirants, as blocking your pores up is wrong. After all they recommend that opening and cleansing the pores on other parts of your body is a good idea, can't both be right.
I have recently had to stop using deodorants, as I've become allergic to them, or possibly to the alchohol they contain, same goes for cologne. I have discovered a preparation in Boots called Trust which is an ointment type long term deodorant, 5 days between applications, it is expensive, but it works.
Giok