Any process that activates or increases the frequency, rate or extent of the chemical reactions and pathways resulting in the formation of inositol trisphosphate.
Synonyms:
exact_synonym:
positive regulation of IP3 biosynthesis; positive regulation of IP3 biosynthetic process; positive regulation of inositol trisphosphate anabolism; positive regulation of inositol trisphosphate biosynthesis; positive regulation of inositol trisphosphate formation; positive regulation of inositol trisphosphate synthesis
narrow_synonym:
positive regulation of myo-inositol trisphosphate biosynthesis; positive regulation of myo-inositol trisphosphate biosynthetic process