Below is the result of some experiments on bee stings by a guy that went to a beekeeper and deliberately got stung so he could try some of the pharmaceutical and home remedies.

He said the best home remedies were ice, toothpaste (docs hazarded a guess that the alkaline paste neutralized the acidic venom), and a paste made from vinegar + baking soda + meat tenderizer.

The best pharmaceuticals were Caladryl lotion, or hydrocortisone cream, both of which you have to reapply after several hours.

Surprisingly, he found that most of the made-for-stings cures were useless or close to that.

He also tested deodorants, Benedryl cream, a slice of raw white onion, tobacco, and honey.

But while he tried his remedies on actuall BEE stings, the results may vary on wasp and hornet stings, ants and others of this ilk. I know they have different anti-venins for them.

http://www.slate.com/id/2088863/

Sue