(1R,4R)-6-FLUORO-(N-METHYL- OR N,N-DIMETHYL-)-4-PHENYL-4,9-DIHYDRO-3H-SPIRO-[CYCLOHEXANE-1,1-PYRANO[3,4,B]INDOL]-4-AMINE FOR TREATING FIBROMYALGIA AND CHRONIC FATIGUE SYNDROME
The invention relates to a pharmaceutical dosage form comprising (1r,4r)-6-Fluoro-(N-methyl- or N,N-dimethyl-)-4-phenyl-4,9-dihydro-3H-spiro-[cyclohexane-1,1-pyrano[3,4,b]-indol]-4-amine or a physiologically acceptable salt thereof, for use in the treatment of fibromyalgia or chronic fatigue syndrome.