The dependence comes from not being able to get your pecker hard in the first place. If you use Aspire to solve a problem, it's like using bandaids and towels to patch up a 5" open wound in the quad. Eventually you'll have to figure out what the hell it is that's causing this and stop using a sexual enhancer everytime you want to make love.
I can almost guarantee that the American erectile dysfunction epidemic is correlated with the piss poor diets and exercise habits that most Americans have.
If your lifestyle has a few kinks in the hose, don't turn the valve counter-clockwise even more, just find where the kinks are and straighten them out.
If you eat crap, fix your diet. If you are unable to manage stress properly, look into adaptogens. If you're not attracted to the person you are hooking up with.... ehhh... maybe pop an Aspire.
There's no reason that one should become addicted to Aspire or any other ED solution at that.