Why Did My Weight Loss Stall on Semaglutide or Tirzepatide?

You took your shot on schedule. You have been eating less than you have in years. And the scale has said the same number for three weeks running.

This is one of the most common things we hear at a check-in, and it usually has an ordinary explanation. Some of the reasons need nothing more than patience. A few are worth changing.

This article is general information, not medical advice. Talk to your own provider before changing anything about your medication.

Is it normal for weight loss to stop on semaglutide?

Yes, at some point it is expected.

Weight comes off fastest in the first several months, then the curve flattens. In the big published trials, people kept losing for well over a year before leveling off: around 68 weeks in STEP 1 for semaglutide, and 72 weeks in SURMOUNT-1 for tirzepatide. Those averages look smooth on a chart, but one person’s weeks are lumpy, with flat stretches along the way.

Your body also adjusts as you get lighter. A smaller body burns fewer calories at rest and on the move, so the portion that produced a loss in month two may only hold you steady in month six.

Timing matters too. The first dose of either medicine is a starting dose, chosen so your stomach can get used to it, and most people need a higher dose later for the full effect. If you are early in the plan and things feel slow, that may simply be where you are on the dose schedule.

What could be slowing it down?

Before deciding you have hit a true plateau, look at a few things that fool the scale or quietly add calories back in.

Water and the bathroom. Constipation is common on these medicines, and a few days of it can show up as a pound or two. So can a salty restaurant dinner, a hard workout or, for women, the week before a period. Weigh yourself at the same time of day and look at the trend over three or four weeks rather than any single morning.

Drinks and grazing. When appetite drops, meals shrink, but coffee drinks, wine, juice and small handfuls through the afternoon often stay the same. These are easy to miss because they never feel like eating. Writing down everything for one ordinary week usually finds it.

Too little protein. If you are eating very little, and most of it is crackers and toast because that is what sits well, you can lose muscle along with fat. Less muscle means a lower calorie burn, which makes the next few pounds harder. Building each meal around a protein first helps, and so does some strength work two or three times a week. It doesn’t need to be a gym; resistance bands at home count.

Missed or late doses. A shot that slips from Sunday to Wednesday, or gets skipped while traveling, can blunt the effect for that week. Holidays are the classic time for this. If you will be away for Thanksgiving, plan where and when the dose happens before you pack.

Other medicines and health changes. Some medications, poor sleep and thyroid problems can all make weight harder to lose. Mention anything new since your last visit, even if it seems unrelated.

What should you do before your next check-in?

Don’t change your dose on your own, and don’t double up after a missed week. Both raise the chance of nausea and other side effects without much benefit.

What helps most is coming in with real information. Bring your weight trend, ideally a few readings a week. Bring a waist measurement too, taken at the belly button, because inches sometimes keep coming off while the scale sits still. Tell us how hungry you actually are now compared with your first month, and whether any side effects have changed. That tells us far more than “it stopped working.”

At your check-in, our medical team reviews your progress, your dose and any side effects, and adjusts the plan from there. That might mean a dose change, a closer look at food and activity, or simply confirming you are where you should be and staying the course. We offer both semaglutide and tirzepatide, and which one suits you is part of that conversation.

One more thing worth hearing: a stall after you have already lost a good amount is often your body settling at a new weight. Keeping that weight off is real progress, even when it feels like nothing is happening.

If you are on a plan elsewhere and wondering whether it is still working, you’re welcome to book a consultation with us in Montville and talk it through.