Assertion: promethazine's effect | /r/HasProperty | due
Facets:
Source sentences:
text: The cough suppressant effects may be due to is anticholinergic effects.
text: Promethazine rapidly crosses the blood brain barrier and it is thought that the sedative effects are due to blockade of H1 receptors in the brain.
text: The antiemetic effect of promethazine may be due to blockade of dopaminergic receptors in the chemoreceptor trigger zone (CTZ) of the medulla.