DDC and supranuclear palsy, progressive, 1: For motor (parkinsonian) symptoms, levodopa with a DOPA decarboxylase inhibitor (e.g., carbidopa or benserazide) is generally prescribed; this combination typically shows modest to no success in most PSP phenotypes, but it may be potentially beneficial in the PSP‐P subtype, particularly at higher doses (Rowe et al., 2021).