Dr Jordan here in Los angeles was one of the first to give botox for TOS. He has several paitients with good to excellent results (i am one of them). For milder TOS the effects can be long lasting, for me it was more of a 6 week thing.

Durign surgery turns out my compression was quite severe, so i guess the short results on the botox aren't surprising. I also used it for relief on the right side when i had surgery on the left..

Also- VERY VERY important to get it in the right place....Dr J uses ultrasound and EMG guidance. Others use open MRI...