▁dise ases ▁in ▁order ▁to ▁indu ce ▁the ▁brain ▁to ▁produce ▁new ▁cells ▁and ▁to ▁make ▁more ▁connections ▁between ▁neur ons . ▁ ▁Ph arma ce ut ical s ▁Ph arma ce ut ical s ▁play ▁a ▁vital ▁role ▁in ▁maintain ing ▁stable ▁brain ▁chem istry , ▁and ▁are ▁the ▁most ▁commonly ▁used ▁ne uro techn ology ▁by ▁the ▁general ▁public ▁and ▁medicine . ▁Dru gs ▁like ▁ser tr al ine , ▁m eth yl phen id ate , ▁and ▁z ol p ide m ▁act ▁as ▁chemical ▁mod ul ators ▁in ▁the ▁brain , ▁and ▁they ▁allow ▁for ▁normal ▁activity ▁in ▁many ▁people ▁whose ▁bra ins ▁cannot ▁act ▁normally ▁under ▁phys i ological ▁conditions . ▁While ▁ph arma ce ut ical s ▁are ▁usually ▁not ▁mentioned ▁and ▁have ▁their ▁own ▁field , ▁the ▁role ▁of ▁ph arma ce ut ical s ▁is ▁perhaps ▁the ▁most ▁far - re aching ▁and ▁common place ▁in ▁modern ▁society ▁( the ▁focus ▁on ▁this ▁article ▁will ▁largely ▁ignore ▁ne uro ph arma ce ut ical s , ▁for ▁more ▁information , ▁see ▁ne uro ps ych oph arm ac ology ). ▁Mov ement ▁of ▁magnetic ▁particles ▁to ▁target ed ▁brain ▁regions ▁for ▁drug ▁delivery ▁is ▁an ▁emer ging ▁field ▁of ▁study ▁and ▁causes ▁no ▁detect able ▁circuit ▁damage . ▁ ▁Low ▁field ▁magnetic ▁stim ulation ▁ ▁Stim ulation ▁with ▁low - int ens ity ▁magnetic ▁fields ▁is ▁currently ▁under ▁study ▁for ▁de pression ▁at ▁Harvard ▁Medical ▁School , ▁and ▁has ▁previously ▁been ▁expl ored ▁by ▁Bell