The present invention relates to a pharmaceutical composition comprising a cyclotide and a ligand of the kappa opioid receptor (the kOR), or a combination thereof, for use in treating Multiple Sclerosis (MS), in remyelination, in improving CNS lesions, in preventing or reducing demyelination and/or CNS lesions, and/or in treating pain, in particular neuropathic pain and/or pain resulting from/coming along with MS. The present invention further relates to a combination of a cyclotide and a ligand of the kOR and to a pharmaceutical composition comprising said combination. The present invention further relates to a use of a cyclotide for reducing adverse effects of a ligand of the kOR and/or for increasing the potency and/or efficacy of a ligand of the kOR. Further, the present invention relates to a kit comprising a cyclotide and a ligand of the kOR. The present invention further relates to a pharmaceutical composition as part of a kit, wherein a comprised cyclotide and ligand of the kOR are for use in treating MS and related diseases and/or symptoms. The present invention further relates to a kit comprising a pharmaceutical composition comprising a cyclotide and a ligand of the kOR, wherein said pharmaceutical composition and/or said cyclotide and ligand of the kOR is/are for use in treating MS and related diseases and/or symptoms. The invention further relates to (a) novel Viola-type cyclotide(s).