Anhedonia: Introduction. Anhedonia: Anhedonia is an inability to experience pleasure from enjoyable experiences. See detailed information below for a list of 14 causes of Anhedonia, Symptom Checker, including diseases and drug side effect causes. » Review Causes of Anhedonia: Causes | Symptom Checker ». Listed below are some combinations of symptoms associated with Anhedonia, as listed in our database. Visit the Symptom Checker, to add and remove symptoms and research your condition. Anhedonia: Symptom Checker.