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GLP-1 Weight Loss: What to Expect in Your First 90 Days

August 24, 2026 · 6 min read · By Abigail Leonoras, AGNP-C
Provider at Henderson Primary Care in Las Vegas reviewing a GLP-1 weight loss plan with a patient

Starting a GLP-1 medication like semaglutide or tirzepatide is exciting and a little nerve-wracking. Here's the honest, month-by-month picture we give our own medical weight loss patients in Las Vegas and Henderson, so you know exactly what the first 90 days look like.

Days 1–30: starting low

We start at the lowest dose and titrate up slowly, because that is how you avoid the nausea stories you've read online. Most patients notice appetite changes within 2–4 weeks: food gets quieter, portions shrink naturally, and the constant background noise about eating fades. Expect 2–5% of body weight in the first month, mostly from eating less without white-knuckling it.

Days 31–60: finding your dose

At your monthly visit we review how you're feeling, check in on side effects, and decide whether to increase the dose. This is where the medication starts doing real work. We also review your labs and make sure protein intake and hydration are on track, because losing weight too fast without enough protein costs you muscle.

Days 61–90: momentum

By month three, most patients are down 5–10% of their starting weight and the habits start to stick: smaller portions feel normal, not forced. Clinical trials show 12–22% total body weight loss over 12–18 months, so 90 days is the on-ramp, not the finish line. This is also when optional behavioral health and nutrition support pays for itself, because the medication handles appetite while you rebuild your relationship with food.

What makes a medical program different from an app

  • A real provider sees you every month, not a chatbot
  • Quarterly labs catch problems early
  • Dose titration is managed for you, so plateaus get addressed, not ignored
  • Your weight care is coordinated with your primary care, blood pressure, and diabetes management

Our Complete GLP-1 Program is $299 per month, all-in, with an optional $100 per month behavioral health and nutrition add-on. If you're in Las Vegas or Henderson and ready to start, request a call back and we'll walk you through whether it's a fit.

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