The invention relates to solid forms of (1r,4r)-6-fluoro-N,N-dimethyl-4-phenyl-4,9-dihydro- 3H-spiro[cyclohexane-1,1-pyrano[3,4b]indol]-4-amine and sulfuric acid such as (1r,4r)-6- fluoro-N,N-dimethyl-4-phenyl-4,9-dihydro-3H-spiro[cyclohexan e-1,1-pyrano[3,4b]indol]-4- amine sulfate or hemi-sulfate, in particular crystalline forms and/or amorphous forms thereof, pharmaceutical compositions and medicaments comprising these solid forms, the use of these solid forms as well as to a process for obtaining them.La invención se refiere a formas sólidas de (1r,4r)-6´-fluoro-N,N- dimetil-4-fenil-4´,9´-dihidro-3H-espiro[ciclohexano- 1,1´-pirano[3,4,b]indol] 4 amina y ácido sulfúrico tal como sulfato o hemi-sulfato de (1r,4r)-6-fluoro-N,N-dimetil-4-fenil-4 , 9 -dihidro-3 H-espiro [ciclohexano-1, 1´-pirano[3,4b]indoll-4- amina, en particular formas cristalinas y/o formas amorfas de esto, composiciones farmacéuticas y medicamentos que comprenden estas formas sólidas, el uso de estas formas sólidas así como un proceso para obtenerlas.
