Hi. I'm online and happy to answer your question today.
I am a retina surgeon and inject avastin and associated drugs almost every day in my practice.
I can tell you, without any doubt, that avastin does not cause -- nor will it worsen -- diabetic neuropathy in any way. There is no need for you to worry.
It does, however, work very well in diabetic eye disease, which was recently confirmed in a nationwide study.
Does this answer your question to your satisfaction?
I hope this information was helpful for you. But I do work for tips so I want to make sure you are happy with me before rating me. If you have another question on this or a related issue feel free to fire away. And please let me know if the rating system gives you any troubles. Thanks in advance, Dr. Rick