Gas drops

My son is a month old and my sis in law recommended gas drops for his colic and gas. We use both mommys bliss and little remedies. I can't figure out which works best so I've been going back and forth to see but I was wondering if it's safe to alternate gas drops? We don't use them for every feeding, just the recommended amount. But just wanted to see if I could continue alternating or if I should stick with just one brand