It can be done, and I asked about it for myself at one point. In my case it was discouraged due to the dosage I need. I was told I would need so many injection sites to get the amount in that I need--something like 10 or 15. Each of those swells up as the drug goes in...and that would need to be done weekly. I think it would get "old" really fast.

It's definitely something worth exploring, as the technology has improved a lot since I asked about it 6 or 7 years ago. If you learn anything, please post back to us!