During Mahapradosham, while there is a stipulation for Sri Nrisimha aradhanam and avoidance of slokas, Can Vishnu Sahasranamam be recited? Is this considered to be recited for Vishnu or Nrismhan? As per the commentary of Mukkur Lakshmi Narasimhachar Svami, it is Nrisimhan centric – can we recite Vishnu Sahasranamam? During the pradosham aradhanam at Sri Nrishmhan sannidhi, can a section of the Vedas, other pasuram-s (Pradosha kala exception being Sri Nrisimhan slokas and pasuram-s) be chanted?

While there is a stipulation for Sri Nrisimhan aradhanam, Vishnu Sahasranamam should not be recited. It is not a practice of the elders. On the other hand, it is a practice at Nrisimhan sannidhis during few occasions such as thirumanjanam, special aradhanams, etc., parayanams will take place in which we can participate.
A specific procedure and practice are in place for Prodosha aradhanam at Sri Nrisimha sannidhi. As per the Agamas, those that are prescribed by those procedures, can be followed by us.