Is it possible to combine berberine with Pregabalin, and drugs Duspatalin, Tribux forte, No-spa and Tertensif?

Yes, you can. These preparations do not interact with each other clinically relevant and would preclude their combined use. It is also better to spread the use of preparations over time, so as not to overload the liver while metabolizing the preparations. However, due to the fact that not all interactions between drugs and supplements are properly documented, I recommend extreme caution when using them. If you use any medications chronically, consult your doctor before starting other medicinal products or dietary supplements yourself. I enclose additional information that may be helpful: https://www.gdziepolek.pl/artykuly/czy-przyjmowanie-kilku-lekow-jednoczesnie-jest-bezpieczne