The invention relates to a pharmaceutical composition comprising a first pharmacologically active ingredient selected from (1r,4r)-6′-fluoro-N,N-dimethyl-4-phenyl-4′,9′-dihydro-3′H-spiro[cyclohexane-1,1′-pyrano[3,4,b]indol]-4-amine and the physiologically acceptable salts thereof, and a second pharmacologically active ingredient which is an anticonvulsant selected from the group consisting of retigabin, lamotrigine, lacosamide, levetiracetam, carbamazepine, sultiame, phenacemide, felbamate, topiramate, pheneturide, brivaracetam, selectracetam, zonisamide, stiripentol, beclamide, mexiletin, ralfinamide, methylphenobarbital, phenobarbital, primidone, barbexaclone, metharbital, ethotoin, phenyloin, amino(diphenylhydantoin) valeric acid, mephenyloin, fosphenyloin, paramethadione, trimethadione, ethadione, ethosuximide, phensuximide, mesuximide, clonazepam, lorazepam, diazepam, clobazam, oxcarbazepine, eslicarbazepine, rufinamide, valproic acid, valpromide, aminobutyric acid, progabide, tiagabine, and the physiologically acceptable salts thereof.