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Many people who decide “semaglutide isn’t working” do it early, while they’re still on 0.25 or 0.5 mg. Those doses are designed to train your gut, and they aren’t meant to move your weight.
True non-response exists, but you can only call it after eight weeks at a therapeutic dose with no missed shots. This checklist helps you tell the two apart.
You may not have reached the real dose yet
On the Wegovy label, semaglutide goes up in steps of about four weeks: 0.25 → 0.5 → 1.0 → 1.7 → 2.4 mg weekly. The first month at 0.25 mg is a tolerance dose. At the pace on the label, reaching 2.4 mg takes about 16 weeks, and longer if side effects slow the climb.
Everyone quotes the 14.9% average weight loss on brand-name semaglutide (Wegovy) from STEP 1 (Wilding et al., NEJM 2021, 1,961 adults). That was measured at week 68, on 2.4 mg, compared with 2.4% on placebo, and those people spent their first four months just climbing the dose ladder. If you’re six weeks in on 0.5 mg and comparing yourself to that number, you aren’t failing. You’re reading the last page first.
Check your appetite before the scale
The earliest reliable signal isn’t weight. Semaglutide acts on the appetite centers in your brain and slows gastric emptying (how fast your stomach empties). What you feel is quieter food noise, earlier fullness, and portions that shrink without a fight. These appetite changes often show up before the dose is high enough to show on the scale.
So ask a better question: is your hunger different? If it is, the drug is doing its job, and weight tends to follow as the dose goes up. If your appetite really hasn’t changed at 1.0 mg or higher, write that down, because it’s the most useful thing you can tell your clinician.
Check the boring stuff
- Missed doses. What to do after a missed dose depends on your exact product, so follow its label or your pharmacy’s and clinician’s instructions. The missed-dose guide explains more. Quietly skipping two doses in eight weeks cuts your dose by 25% without you realizing it.
- Storage. Storage rules depend on your exact product, so check its instructions. A dose that rode home in a hot car or sat out for days is a real suspect. If you’re not sure, ask the pharmacy that dispensed it.
- How you inject. The shot goes just under the skin, into the fat of your belly, thigh, or the back of your upper arm, rotating sites each time. Redness or a small bump at the site is common and stays local, but for anything more than that, send a photo to your care team.
The drug turns down hunger, but it can’t fix everything
Semaglutide cuts down eating that comes from hunger. But eating that was never about hunger, like stress, boredom, or the 9 p.m. snack habit, sits outside what the drug does. Liquid calories also mostly slip past the fullness signal that a slower stomach creates. If your appetite is clearly quieter but the scale hasn’t moved, this is often where the calories are hiding. Two weeks of honestly logging what you eat will answer it faster than any dose change.
How to call true non-response
Only call it when all four of these are true:
- You’ve been on 1.7 or 2.4 mg (or the highest dose you can handle) for at least eight weeks.
- You haven’t missed any doses, and your storage and injections check out.
- Your appetite really hasn’t changed.
- Your scale, waist, and clothes have all stayed the same since you started.
One difference matters here. If you lost weight steadily for months and then stalled, that’s a plateau, which has different causes and a different plan. This checklist is for people who never saw any response at all. That group is real.
When switching to tirzepatide is the right call
Tirzepatide acts on the same GLP-1 receptor and adds a second pathway, called GIP.
Here’s what we don’t know. No trial has tested tirzepatide in people semaglutide didn’t work for, so nobody can tell you how often a switch succeeds. The second receptor is the reason, based on how the drugs work, that the result could be different. Switching is one option your clinician may consider once other causes have been checked. It isn’t automatic.
Both drugs carry a boxed warning for thyroid C-cell tumors, and you can’t take them if you or a family member has had medullary thyroid carcinoma or MEN 2. The same screening that cleared you for semaglutide applies to tirzepatide, and neither one is for use in pregnancy.
The switch is simple, but don’t take it lightly, because you restart low on the new drug and titrate up again. Here’s what switching looks like. At Zappy, compounded tirzepatide has its own price, listed on the treatment page, and a clinician approves the switch first.
What to bring to your clinician
Bring five things: your current dose, how many weeks you’ve been on it, how many doses you’ve missed, whether your appetite has changed, and what the tape measure says. That turns “it’s not working” into a decision someone can actually make: hold the dose, raise it, fix missed doses, or switch drugs.
If you’re a Zappy member, send those five things to your care team. If you’re not, the five-minute quiz puts them in front of a clinician, who reviews every case within 24 hours.
