Yes, my friend that sells MTII tells women how to use it in this way since they fear so much of injecting and it still works okay however you will need more than when injecting it so it's more cost effective to inject it, I get it free so I don't mind.
Empty a saline nose spray, put 10 ml of sterile water inside and reconstitute your Melanotan2 with 1 ml of sterile water and then put it inside the bottle with a syringe. Then have 2 sprays in each nostril for 7 days then just two times a week afterwards.. It's alot less accurate and more wasteful but if you don't like injecting then that's another way to take it