▁form ulation ▁of ▁the ▁ant ib i otic ▁D - cy clos er ine , ▁an ▁ant agon ist ▁of ▁the ▁g ly c ine ▁site ▁of ▁the ▁N MD A ▁re ceptor , ▁and ▁l uras id one , ▁an ▁at yp ical ▁anti ps ych otic , ▁which ▁is ▁under ▁development ▁by ▁Ne uro R x ▁for ▁the ▁treatment ▁of ▁ac ute ▁suic idal ▁ide ation / be havior ▁( AS IB ). ▁As ▁of ▁May ▁ 2 0 1 6 , ▁it ▁has ▁completed ▁a ▁phase ▁II ▁clin ical ▁trial ▁for ▁b ip olar ▁de pression . ▁In ▁September ▁ 2 0 1 7 , ▁the ▁drug ▁received ▁fast ▁track ▁design ation ▁for ▁b ip olar ▁de pression ▁from ▁the ▁United ▁States ▁Food ▁and ▁D rug ▁Administration . ▁ ▁Currently ▁pre cl in ical ▁information ▁on ▁Cy cl ur ad ▁comes ▁from ▁two ▁phase ▁II ▁clin ical ▁tri als ▁looking ▁at ▁the ▁significance / e ffic acy ▁of ▁D - cy clos er ine ▁in ▁the ▁treatment ▁of ▁de pression , ▁in ▁which ▁D - cy clos er ine ▁could ▁be ▁a ▁cost - effect ive ▁target ▁for ▁novel ▁ph arma ce ut ics ▁( Ph ase ▁II ). ▁There ▁is ▁a ▁clin ical ▁trial ▁sl ated ▁for ▁treatment ▁of ▁AS IB ; ▁however , ▁en roll ment ▁for ▁the ▁study ▁has ▁not ▁been ▁started ▁as ▁of ▁yet . ▁The ▁investig ators ▁will ▁admin ister ▁an ▁int ra ven ous ▁inf usion ▁of ▁k et am ine ▁ 0 .