When to continue using crescina post FUE hair transplant?

I have been using crescina regrowth hair follicular 2100 by labosuisse and was helping me a lot especially i can feel my scalp is red for sometime and blood is circulating after pouring the ampoule to my head .when can i go back to use it . The reason i asked is that a lot of people are not aware of crescina and recomend only minoxidil which i try to avoid as its life usuage thing.