Will future GPs prescribe placebo pills?

They seem to work, even when used open label

It’s 2028 and the patient in front of you is back again about their irritable bowel syndrome. Nothing has helped, so it’s time to prescribe the pink pills. You’ve explained that there’s nothing in these pills known to act on IBS — in fact, they are physiologically inert but they seem to help some people. You write out the script, prescribing placebo, open-label.