Solid form of ((1R, 4R) -6'-fluor-N, N-dimethyl-4-phenyl-4 ', 9'-dihydro-3'H-spiro [cyclohexane-1,1'-pyran [3, 4, b] indole] -4-amine and sulfuric acid.Forma sólida de ((1R,4R)-6'-fluor-N,N-dimetil-4-fenil-4',9'-dihidro-3'H-espiro[ciclohexano-1,1'- pirano[3,4,b]indol]-4-amina y ácido sulfúrico.