While you're trying out different antiperspirants, or whatever other treatment your doctor recommends, you can also incorporate some of these at-home solutions to help reduce sweating.
1. Don't wear heavy clothes that will trap sweat. Instead, wear light, breathable fabrics such as cotton and silk. Bring along an extra shirt when you know you'll be exercising or outdoors in the heat. Your feet can sweat too, so wear socks that wick moisture away from them (merino wool and polypro are good choices).
2. Shower or bathe every day using an antibacterial soap to control the bacteria that can inhabit your sweaty skin and cause odors. Dry yourself completely afterward, and before applying antiperspirant.
3. Use underarm liners and shoe inserts to absorb sweat so it doesn't ruin your clothes or start to smell.
4. Don't order a double jalapeño burrito with a margarita at your favorite Mexican restaurant. Spicy foods and alcohol can both make you sweat, as can hot drinks like tea and coffee.