Wow.. Just wrote out a reply with links and the page timed out and refreshed and it all disappeared! So annoying!
As
@Irat said, increasing the amount of dopamine either by inhibiting reuptake, breakdown, or by providing direct precursors like l-dopa that can bypass rate-limiting steps can lead to receptor downregulation and issues based on that. If the drugs are extremely helpful for you then you can of course weigh up the pros and cons but I think it's important to keep this in mind if you want to experiment with them.
I'm not sure if semax would have this type of effect (potentially?), I will need to read in the literature more about it. I currently don't use it every day just in case. BPC-157 doesn't seem to work in this type of way, but the research has not been well funded enough where people have comprehensively determined the mechanisms with any of these peptides.
Here is part of the abstract from
a paper on BPC-157:
I'm not sure how you could access peptides most easily - maybe you could ask
@mitoMAN , I believe he is also in Germany. It might be possible to directly order from China, this is by far the cheapest route.