edit: I'm deleting the contents of this post, because I was probably either talking out of my *** or remembering the effects of a specific component of garter venom that may not be present in sufficient quantities to cause what I was referring to earlier.

However, I found this.

Journal of Herpetology, Vol. 21, No. 1, pp. 81-83, 1987
Copyright 1987 Society for the Study of Amphibians and Reptiles

The Myonecrotic Effect of Duvernoy's
Gland Secretion of the Snake
Thamnophis elegans vagrans

DAVID W. JANSEND, epartment of Zoology Basic Medical
Sciences, Washington State University, Pullman, Washington
99164-4220, USA

The muscle cells at the injection sites of Duvernoy's
gland secretion showed widespread rhabdomyodegeneration
and necrosis. This is characterized
by kinking of the muscle fibers and by areas of vac-uolation within fibers (Fig. 1). There was a readily
apparent loss of striation, with hemorrhagic damage
as well, and many polymorphonuclear leukocytes
were present between the muscle fibers. None of these
pathological changes was detected in either control
group. Striations were present and uninterrupted, and
the muscle cells were entire, with no evidence of
vacuolation or kinking.