Generally speaking, these drugs are fake. So far, no non-hormonal drugs have this effect.

I don't know Thai, and I don't know if it is also called "kudzu root" and "herb" in Thai. I only know that "Pueraria lobata" is an authentic Chinese medicine, and the word "herb" seems to be used in botany and is often used by Chinese medicine. Since it is a typical Chinese medicine term, why does it come from Thailand? Probably Mongolian.

To sum up: don't believe it!