Methods of treating patients with dyskinesias, by administering a therapeutically effective amount of a dual-action mu-opioid receptor antagonist/kappa-opioid receptor agonist or prodrug thereof to a subject in need thereof, sufficient to mitigate the dyskinesia. Alternatively, a combination of both a mu-opioid receptor antagonist or prodrug thereof, and a kappa-opioid receptor agonist or prodrug thereof can be administered, either together or separately.
