Claim 1: a Crystalline form, is characterized in that the CIS - (e) - 4 - (3-fluorophenyl) - 2,3,4,9 - tetrahydro - n, N - dimethyl - 2 - (1 - phenyl - 3 - oxo - 2-propenyl) - spiro [- 1,1 ciclohexan [1H] - [3,4 pirido - B] indole] - 4 - amine.Reivindicación 1: Una forma cristalina, caracterizada porque es de la cis-(E)-4-(3-fluorofenil)-2,3,4,9-tetrahidro-N,N-dimetil-2-(1-oxo-3-fenil-2-propenil)-espiro[ciclohexan-1,1[1H]-pirido[3,4-b]indol]-4-amina.