Any process that activates or increases the frequency, rate or extent of inward rectifier potassium channel activity.
Synonyms:
exact_synonym:
activation of Kir channel activity; positive regulation of Kir channel activity; up regulation of Kir channel activity; up regulation of inward rectifier potassium channel activity; upregulation of Kir channel activity; upregulation of inward rectifier potassium channel activity
narrow_synonym:
activation of inward rectifier potassium channel activity