The highly popular erectile dysfunction (ED) drug Viagra was originally developed as a possible treatment for angina due to its ability to boost blood circulation to the heart and stimulate the release of nitric oxide (most natural male enhancement supplements contain an ingredient that helps where can you buy doxycycline produce nitric oxide - more on that later). Subsequently, it turned out that Viagra was not good enough to be used as a heart medication. However, researchers noticed that it did cause frequent erections.

The rest is male enhancement history. The blue pill was approved by the Food and Drug Administration as a prescription ED medication. Millions of prescriptions have since been issued, making Viagra one of the most successful drugs of all time.

The Erection Process Explained
When you are aroused, blood enters the corpora cavernosa, a cave-like structure of spongy erectile tissue located within the shaft of your penis. This causes your penis to become stiff and enlarged.