Giving spit-up formula to baby not spitting up

Gi
I just got a lot of free samples of Similac Spit-Up formula from the pediatrician... after I had stocked up on it already. I don't know how long my baby will be spitting up (today is the first time he hasn't). So dumb question: Is it still ok to give Similac Spit-Up if the baby is no longer spitting up?