Deodorants. I believe almay and dove make hypoallergenic deodorants -- another option, would be prescription drysol -- this is a strong antiperspirant which may negate the need for a deodorant.
Try. Tom's or other natural deodorants.
Avoid fragrance. If you have a problem with multiple deodorants, it is likely that you are allergic to fragrance. There are a few fragrance-free products available. Tom's of maine makes a "sensitive" labeled deodorant that contains no added fragrance, just some plant oils. Another fragrance-free product is naturally fresh deodorant crystals. If you are not sensitive to antiperspirants try a fragrance-free one.