How can I treat gustatory rhinitis without a prescription?

I seem to sneeze after every meal, and then have a very runny nose, and had just seen online I would need a prescription for a nasal spray, but I like to avoid drugs as much as possible. What natural remedy would work just as well, without side effects?

Spicy foods (such as chili peppers, horseradish, black pepper, and onion) and alcoholic beverages are the two most common causes for gustatory rhinitis.
Avoiding trigger foods is an most effective way to treat gustatory rhinitis.