Nadi Dosha, is one of the most important factors in Kundli matching. It can create concerns about health, compatibility, and childbirth, but there are few remedies to reduce that can reduce its impact. The simplest remedy is performing a Nadi Dosha Nivaran Puja by a karamkand brahmin.
In the birth charts of boy and girl If the dosha appears but the couple has the same rashi but different nakshatra padas then Nadi dosha can be ignored. Also, check Nadi Paad vedha to be sure that Nadi dosha gets cancelled.
Mantras like the Mahamrityunjaya Mantra strengthen marital harmony and reduce Nadi dosha impact; however, it has to be done as per instructions given in the shastras.