Your first month on GLP-1 medication is the steepest learning curve. Here's what to expect week by week, based on clinical protocols and real-world patient experience.
Week 1: Starting Dose
You'll begin at the lowest dose — typically 0.25mg semaglutide or 2.5mg tirzepatide. Many patients feel minimal effects in the first few days. By mid-week, you may notice a mild reduction in appetite and some GI symptoms (mild nausea, slight bloating). These are normal and typically manageable.
What to do: Eat regular meals even if your appetite is reduced. Focus on hydration (at least 64 oz of water daily). Take your injection at the same time each week to establish a routine.
Week 2: Side Effects May Peak
The second week is often when side effects are most noticeable. Nausea may increase, especially after meals. Some patients experience constipation, fatigue, or mild headaches. This is your body adjusting to the medication.
What to do: Eat smaller, more frequent meals. Avoid greasy or heavy foods that can worsen nausea. Ginger tea can help with stomach discomfort. Don't skip meals — low blood sugar from not eating makes nausea worse.
Week 3: Appetite Suppression Kicks In
By week three, most patients notice meaningful appetite reduction. You may find yourself satisfied with smaller portions and less interested in snacking. Some patients describe a new ability to "take or leave" food that previously felt irresistible.
What to do: Prioritize protein at every meal (aim for 25–30g per meal). Start or continue resistance exercise if cleared by your provider. Track your food intake for a week to ensure you're getting enough nutrition despite reduced appetite.
Week 4: First Results
Most patients see measurable weight loss by the end of month one — typically 3–7 pounds, depending on starting weight, diet, and activity level. More importantly, you're establishing the habits and tolerability patterns that will carry you through the titration process.
What to do: Weigh yourself once per week (same day, same time, same conditions). Don't chase the scale daily — water weight fluctuations will drive you crazy. Focus on the trend, not individual readings.
When to Contact Your Provider
Reach out if: nausea persists beyond 48 hours and prevents eating, you experience severe abdominal pain, vomiting lasts more than 24 hours, or you notice signs of pancreatitis (sharp upper abdominal pain radiating to the back). These are uncommon but require medical attention.
Ready to Start?
Choosing a provider with good onboarding support makes the first month significantly easier. These providers offer clinical follow-up during the critical early weeks.
Sunlight $159/mo sema, $239/mo tirz · LegitScript certified. Flat pricing — $159 first month, $179 ongoing (semaglutide). No membership, free shipping, HSA/FSA.
⚕️ Compounded medications are not FDA-approved. They are prepared by licensed pharmacies under physician supervision.
Embody From $149/mo · Injectable semaglutide with coaching included. LegitScript-certified 503B pharmacy sourcing. Strong onboarding support.
⚕️ Compounded medications are not FDA-approved. They are prepared by licensed pharmacies under physician supervision.
⚕️ Compounded medications are not FDA-approved. They are prepared by licensed pharmacies under physician supervision.