Please definitely see the following sites:
ALUMINUM CHLORIDE - TOPICAL SOLUTION (Drysol, Xerac AC) side effects, medical uses, and drug interactions. Drysol Drug Information
Also, please speak with your physician and/or a pharmacist.
From the bottom site above:
What are the possible side effects of aluminum chloride hexahydrate?
Get emergency medical help if you have any of these signs of an allergic reaction: hives; difficulty breathing; swelling of your face, lips, tongue, or throat. Call your doctor at once if you have any stinging, burning, redness, or swelling of treated skin areas.
Other less serious side effects are more likely to occur, such as tingling or itching of the treated skin.
Side effects other than those listed here may also occur. Talk to your doctor about any side effect that seems unusual or that is especially bothersome.