I lost nearly 20 lbs since I started my 6 month diet required by insurance in November.

Since I started Prilosec for GERD, I’ve gained 3 lbs. nervous abou going back to my nutritionist tomorrow. I know I haven’t been eating great. But I’ve also been extremely constipated from the new prescription

Prilosec should not make you constipated

Best advice I can give anybody who is getting a sleeve (and presumably applicable for bypass patients as well)

Get in the habit of taking Metamucil. Stuff will be a lifesaver post op, at least early on

And if you're extremely constipated already (preop) then I'd say you need it more than most

That’s good to know.

I’ve spoken with my primary and unfortunately it is a possible side effect of Prilosec. Some get diarrhea, some get very constipated. It was an instant switch when I started taking the Prilosec after my EGD 3 weeks ago.

Actually constipation is a known side effect—

https://www.rxlist.com/prilosec-side-effects-drug-center.htm#overview

But I agree on both the insoluble fiber (Metamucil, psyllium husk, etc) AND soluble fiber like Benefiber or the generic equivalent. Lots of water too.