Letter. Impulsive compulsive behaviours (ICBs) such as dopamine dysregulation syndrome (DDS), pathological gambling, compulsive sexual behaviour, punding, compulsive shopping and binge eating are recognised complications of dopaminergic treatment that affect at least one in seven patients with Parkinson’s disease (PD).1 Only a few studies provide long-term data on ICBs although any firm conclusions are limited by restricted follow-up periods. We present long-term longitudinal data on 46 PD patients with ICBs with follow-up for a mean period of 8.2 years.. To read the full article, log in using your NHS OpenAthens details.