Nicergoline Use in Dysphagia Patients

Inclusion Criteria: * Age greater than or equal to 20 years * Stroke (post events at least 2 months), Parkinson's disease and dementia patients who have dysphagia symptom * Do not take nicergoline prior recruit 2 weeks * Continue current medications * Consent to join Exclusion Criteria: * Allergy to gentamicin or components * On anticoagulants including Heparin, Enoxaparin, Fondaparinux, Warfarin, Dabigatran, Apixaban, Rivaroxaban and Edoxaban * On antiplatelet \> 1 drug (ex. dual antiplatelet) * On ACE-I or Dopaminergic agent 2 months or less * Chronic dyspepsia * Chronic gout or hyperuricemia \> 8 mg/dL * CrCl \< 30 ml/min * Impair hepatic function including child puge B, C or active hepatitis * Brainstem stroke * Parkinson plus syndrome: PSP, MSA, DLB, etc * Advanced cancer or other medical conditions * Bed ridden * Laryngopharynx surgery * SBP\<100 or DBP 60 mmHg * HR\<50/min * Active bleeding * Pregnancy or lactation * Known of poor compliance for any treatments