Pepper spray is extremely effective. Pepper spray effects last a lot longer as compared to other self defense weapons. For instance.. the taser will litterally knock someone to the ground instantly. But as soon as they are no longer being tased, they can get right up. Pepper spray on the other hand, immobilizes an attacker. They cant see you, hard to breathe, totally disorients them.
Heres some more info on
Pepper Spray
And here is what is currently the most potent pepper spray on the market.
Wildfire Pepper Spray
Hope this helps
mike