Nearly 14% of people on semaglutide lose less than 5% of their body weight, even when taking it exactly as prescribed. If you’re one of them, the answer isn’t always “try harder.” Here are the first five reasons your results may be stalling, and what they actually mean.

1. You’re Still on a Starter Dose

The 0.25 mg starting dose is not a treatment dose. It exists entirely to reduce early side effects while your body adjusts to the medication. The 0.5 mg dose isn’t the full picture either. Most meaningful weight loss on semaglutide only kicks in once you’ve reached a proper therapeutic dose, which can take three to four months of titration to get to.

If you’ve been on Ozempic for six weeks and aren’t seeing much happen, you may just not be at the right dose yet.

2. You Haven’t Given It Enough Time

Clinical trials that produced the headline weight loss figures ran for 68 weeks or more. STEP trial data shows the steepest loss typically happens around months four to six, with results gradually plateauing much later. If you’re measuring at week eight, you’re measuring the wrong thing.

Ozempic isn’t fast. The people who get the best results are the ones who stay consistent, not the ones who evaluate it too early and give up.

3. You’re Not in a Real Calorie Deficit

Semaglutide reduces appetite. It doesn’t make what you eat irrelevant. If reduced hunger leads to smaller meals but you’re still consistently eating slightly more than you burn, the scale won’t move.

This catches people out because the appetite suppression can feel dramatic, especially early on, and it’s easy to assume that feeling full means the work is done. It’s not. Some people unconsciously compensate by choosing more calorie-dense food when they do eat. A rough sense of what you’re actually consuming matters, even on GLP-1 medication.

4. You’re Skipping or Delaying Doses

Weekly dosing sounds forgiving. In practice, an Ozempic dose peaks in your system around one to three days after injection, then tapers. A skipped week means a meaningful dip in the medication’s effect. Inconsistency compounds over time, particularly around the holidays, travel, or periods of disrupted routine.

Pick a day of the week and treat it like any other non-negotiable. The medication cannot do its job if it’s not consistently in your system.

5. Another Medication Is Working Against You

This one gets missed constantly. Certain antidepressants (particularly mirtazapine and paroxetine), antipsychotics (olanzapine, risperidone, quetiapine), corticosteroids like prednisone, beta-blockers, and some insulin-stimulating diabetes medications can all cause weight gain independently of what Ozempic is doing. The two effects can partially cancel each other out, leaving you frustrated and wondering why the injections aren’t working.

This is exactly why a full medication review with your prescribing clinician matters before assuming Ozempic is failing you.

Reasons 6 through 10 are in Part 2 of this guide, covering underlying conditions, muscle loss, sleep, plateaus, and why some people genuinely respond differently to semaglutide.

Related: Ozempic for Weight Loss: How It Works · Weight-Loss Injections: How They Work and Who May Be Eligible · How to Lose Weight Safely