Any process that stops, prevents, or reduces the frequency, rate or extent of the chemical reactions and pathways resulting in the formation of prostaglandin.
synonyms:
negative regulation of prostaglandin formation,
down regulation of prostaglandin biosynthetic process,
negative regulation of prostaglandin anabolism,
negative regulation of prostaglandin synthesis,
inhibition of prostaglandin biosynthetic process,
negative regulation of prostaglandin biosynthesis,
downregulation of prostaglandin biosynthetic process,
down-regulation of prostaglandin biosynthetic process
