Im on loprox (ciclopirox) shampoo, can i use conditioner during the hair washing?

absolutely, but use the conditioner after the Loprox is washed off the scalp.

There are likely no studies to answer this definitively. I assume you’re using the shampoo twice weekly with 3 days in between. Ciclopirox is a anti-fungal and anti-inflammatory agent with a half-life of 1.7 hours, which means it remains working in your hair for hours after you rinse. To avoid unwanted interactions which could diminish tx effectiveness, do not use a conditioner on tx days.