Assertion: caffeine | /r/HasProperty | competitive antagonist
Facets:
Source sentences:
text: Because caffeine is a competitive antagonist for adenosine 1 & 2a primarily at striatal sites, it may also selectively increase the efficacy of D2 receptors, given evidence that D2 depleted mice show reduced effects of caffeination.
text: Therefore, caffeine acts as a competitive inhibitor.