Hmm...They put me on ADD medicine at 12 years of age and I had the habit of scrunching my face, playing with my hair (twisting it up into my ponytail if it had fallen out), pulling on my eyelashes and eyebrows, and other nervous habits. I think it has something to do with the medicine.
I stopped taking medication and just decided to use natural methods to overcome it, but I'm 21. He may be able to get off the pill later once he develops his own methods to overcome the ADD (most do, according to studies).
Most of the habits i got ended up being permanent, though.