Any process that stops, prevents or reduces the frequency, rate or extent of sodium ion transmembrane transport.
Synonyms:
exact_synonym:
down regulation of sodium ion membrane transport; down regulation of sodium ion transmembrane transport; downregulation of sodium ion membrane transport; downregulation of sodium ion transmembrane transport; negative regulation of sodium ion membrane transport
narrow_synonym:
inhibition of sodium ion membrane transport; inhibition of sodium ion transmembrane transport