  This review discusses recent results on the astrochemistry of (mostly
high-mass) star-forming regions. After an introduction on the use of chemistry
in astrophysics and some basic concepts of astrochemistry, specific results are
presented. Highlighted areas are the use of chemistry in the search for massive
circumstellar disks, the interaction of molecular clouds with cosmic rays, and
the feedback effects of protostellar irradiation on the parent molecular cloud.
The review concludes with a discussion of future observational opportunities.
