Doctors don't ask about this. People still take Prilosec, and it's acknowledged that it causes cancer. You get what you give: confirmation bias.
Edit: The essential problem is that ranitidine isn't shelf-stable. This could explain some problems with other theraputics which we won't name to avoid downvoting / politics.
This is not acknowledged as demonstrated, the studies are contradictory and observational.
As for prilosec: the cancer risk is acknowledged in the packaging.
I don't see anything about cancer in the product information for Prilosec.
https://www.amazon.com/Prilosec-OTC-Heartburn-Medicine-Versi...
Perhaps you mean in California, where everything + dog has a cancer warning by law?
ddg:prilosec cancer
Buy some. Read the packaging. Fuck Amazon.
You can't see ranitidine when it farts in your face: nitrosamines cause colon cancer. Why is that not relevant? Why is that not potentially more relevant than foo foo microbes? (By the way, I eat sour cream or yogurt when I eat meat or take e.g. glucosamine. YMMV.)