Sexual problems are no longer something of which to be ashamed, since the incredible success of Viagra started a virtual frenzy to find the next little blue pill.

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Two new challengers are promising a prescription for a better sex life.

At 20 years old, Justin Pfister should be in his sexual prime, but since he was a teen, he's suffered from a problem that doesn't usually hit men until later in life.

"Basically, I got an erection, a pretty good one, and then lost it right after about a couple minutes," said Justin Pfister, who suffered from erectile dysfunction.

While stress, depression, or problems in a relationship can cause erectile dysfunction, about 85 percent of cases can be traced to a medical or physical source.

"There are between 10 and 30 million men who have chronic problems getting and maintaining an erection," said Dr. Richard Berger, a urologist.

The good news is almost all impotence can be treated. Thanks to the success of a tiny blue pill, more men are seeking help.

"Diabetes, hypertension, and smoking are probably the biggest factors," said Dr. Jeffrey Brady, a urologist.

Viagra may dominate the erectile dysfunction market, but now two new contenders want to challenge it.

Levitra promises faster erections for better spontaneity. Cialis has been nicknamed the "weekend drug" because it lasts up to 36 hours.

Drug therapy works for about 60 to 70 percent of men.

It helped Pfister get back on track.

"You get the stresses removed and you can think about everything else a little better," said Pfister.

Doctors say the next generation of sex drugs could be dramatically different, working on the brain's electrical wiring, instead of the body's plumbing.

Regardless of which treatment you choose, experts say the most important step is talking with your partner.