I have lactose intolerant since 1997 after major sick from viruses in stomach, after that, lactose intolerant in during my childhood is severe, I can't consume alot of milk, cheese, ice cream or any contain milk with lactose at this time, unless if took Lactaid pills and my stomach got more worse then went visit clinic at hospital then had operate for upper endoscopy in 1998 and prescribed an medicine, it was called Prilosec (not OTC version, there's no OTC at this time) and few others, I started feel alot better and severe of lactose intolerant has been decline, as I just got used with lactose intolerant, after that, I got some heartburn issue.
I still have lactose intolerant but mildly, I only got diarrhea and rarely to get upset or cramp stomach, I can consume of milk, cheese, ice cream or any contain lactose but only cause diarrhea, it's not very big deal since I got used of it. I'm currently have problem with heartburn, I usually take generic version of Protonix, it work so decent, also I want take Nexium, that's more stronger than Protonix but only problem, my medicaid won't cover on Nexium since there's no generic version for Nexium, the pharmacist told me it's cost $150 for 30 pills at Target, I was like rip off and went picked Protonix instead.
I stopped Prilosec in last 7 years ago and went switched to Rolaids, just in case for upset/cramp stomach and severe heartburn.
I had tried soy milk before and hate it, I rather to drink regular 2% milk or whole milk, there's Lactaid milk that contain cow's milk with lactose free.