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 biosynthesis,
negative regulation of prostaglandin anabolism,
downregulation of prostaglandin biosynthetic process,
down regulation of prostaglandin biosynthetic process,
negative regulation of prostaglandin formation,
inhibition of prostaglandin biosynthetic process,
down-regulation of prostaglandin biosynthetic process,
