Penis enlargement pills don´t work!!
These usually contain vitamins, minerals, herbs or hormones such as testosterone that claim to enlarge the penis. None of these products has been shown to be effective. Worst case scenario: you can suffer from an allergic reaction to vitamins or you can overdose. In both cases, call the nearest Poison Control Center, show them the bottle and be very specific on the amount of substance you have ingested or rubbed into your skin.
Here is the article, how extenders work: http://size-your-genetics.blogspot.com/2009/01/penis-enlargement-traction-devices-how.html