I used infacol before every feed for a while, I've also heard colief is good but never used it myself. You can also try gripe water?
I’ve found the colief drops to be much better than infacol. With infacol you have to administer 1ml 10 mins before a feed, they tend to spit it out etc, whereas the the colief drops go straight into the bottle x
Gripe water.
I heard infacol is good but has to be used with every single feed to be effective