The risks seem mostly theoretical to me, especially since these aren't continuous IV infusions. I'm too lazy to bother with the non-GLP versions for extended periods, but I'd say just continue until the symptoms are gone. If you want to play it extra safe you could switch to just KPV during any future break. Because it breaks down so easily with enzymes, KPV is probably the safest one to run at higher doses or without breaks.
I'm dealing with wrist tenosynovitis and have been using BPC, TB, and KPV for 8 weeks. I planned to stop at 8 weeks but still have symptoms even though there's been some improvement. How much longer is it reasonable to keep going? Is there anything else worth adding?