I take claritan D 12 hour and enjoy the benefits it brings. I manage my allergies and although I do experience some negative effects they are mild for me but I fear that long term use is bad for me? I watched a special last night on how the ingredient pseudo ephedrine is also used in Meth. I realize people are cooking it with household cleaners and lighter fluid and other terrible ingredients but they talked so much about how in meth the pseudo ephedrine raised the dopamine levels in the brain and eventually cause chronic depression issues because the user could no longer experience happiness except with the effect of meth. I may be extremely far off here but I'm curious if my taking Claritin D could have the same effect long term or even a milder version?