YES, you can use both Minoxidil and Nanoxidil together as a treatment for hair loss and hair growth. Because they act through different pathways, the products can work together simultaneously.
It is recommended to apply one in the morning and one at night. (i.e. Apply Nanoxidil in the morning and Minoxidil at night).
Minoxidil vs. Nanoxidil (Spectral.DNC-N) As Compared By A Dermatologist - YouTube