--- title: "Your First Week on a GLP-1: What to Expect" description: "Practical guide to your first week on semaglutide or tirzepatide — what you'll feel, how to handle the first injection, warning signs, and day-by-day tips." summary: "There is no fixed day-by-day pattern during the first week on a GLP-1 medicine. Some people notice appetite changes or digestive symptoms; follow your prescribed schedule and report persistent or severe symptoms." canonical: https://remevihealth.com/blog/first-week-on-glp1-what-to-expect/ language: en publisher: REMEVi author: "REMEVi Medical Team" medicalReviewer: "Linda West-Conforti, RN" reviewStatus: current reviewedDate: 2026-09-22T00:00:00.000Z pubDate: 2026-04-19T00:00:00.000Z updatedDate: 2026-09-14T00:00:00.000Z tags: ["first semaglutide injection","first week glp1","starting ozempic","how to inject semaglutide"] alternateLanguage: https://remevihealth.com/es/blog/primera-semana-glp1-que-esperar/ license: "© 2026 REMEVi LLC. Please cite https://remevihealth.com/blog/first-week-on-glp1-what-to-expect/ as the source." --- ## Short answer There is no fixed day-by-day pattern during the first week on a GLP-1 medicine. Some people notice appetite changes or digestive symptoms; follow your prescribed schedule and report persistent or severe symptoms. **Medically reviewed by** [Linda West-Conforti, RN](/medical-team/) · [CA RN #389453](https://search.dca.ca.gov/details/4500/RN/389453/) · 2026-09-22. Founding Nurse · Patient Care Lead. There is no fixed day-by-day pattern during the first week on a GLP-1 medicine. Some people notice appetite changes or digestive symptoms; follow your prescribed schedule and report persistent or severe symptoms. ## Before the first dose Confirm the exact medicine and instructions, record your starting weight and relevant health measures, and agree on a follow-up plan. Your clinician should review nutrition, other medicines and symptoms that need urgent attention. ## The first weeks: assess tolerability The starting dose allows gradual introduction. You may notice appetite changes, digestive symptoms or little change at first. There is no validated day-by-day or month-by-month weight-loss forecast for you. Do not increase the dose on your own to meet a scale target. [Wegovy: prescribing information](https://dailymed.nlm.nih.gov/dailymed/drugInfo.cfm?setid=ee06186f-2aa3-4990-a760-757579d8f77b) ## Over several months: look at the trend Your care team can review weight, nutrition, activity, strength, side effects and relevant health measures. A few unchanged weigh-ins do not establish treatment failure. If progress stalls, check the full plan and tolerability before deciding whether to change treatment. ## What the trials actually measured [STEP 1](https://pubmed.ncbi.nlm.nih.gov/33567185/) studied semaglutide 2.4 mg with lifestyle intervention in adults without diabetes for 68 weeks; average loss was 14.9%, compared with 2.4% with placebo. [SURMOUNT-1](https://pubmed.ncbi.nlm.nih.gov/35658024/) studied tirzepatide for 72 weeks; the 15 mg group averaged 20.9%, compared with 3.1% with placebo. These are different trials and cannot supply a personal weekly target or establish compounded-product results. [Source: STEP 1 randomized trial](https://pubmed.ncbi.nlm.nih.gov/33567185/) [Source: SURMOUNT-1 randomized trial](https://pubmed.ncbi.nlm.nih.gov/35658024/) ## Nutrition, movement and follow-up A smaller appetite still needs adequate nutrition. Discuss protein, fiber, hydration and activity appropriate for your health and ability. Seek help for persistent vomiting, dehydration or severe abdominal pain. Track how you feel and function as well as your weight. ## Plan for maintenance Weight management may require continued treatment. Discuss long-term affordability, monitoring and what to do if you need to stop; tapering is not a proven guarantee against regain. [Source: STEP 1 withdrawal extension](https://pubmed.ncbi.nlm.nih.gov/35441470/) [Explore semaglutide care](/semaglutide/). ## Frequently asked questions ### Can I predict each week’s weight? There is no fixed day-by-day pattern during the first week on a GLP-1 medicine. Some people notice appetite changes or digestive symptoms; follow your prescribed schedule and report persistent or severe symptoms. ## Sources linked in this article These are the external references linked in the article. A reference supports the statement where it appears; it is not an endorsement of REMEVi or a substitute for individual medical advice. - [Wegovy: prescribing information](https://dailymed.nlm.nih.gov/dailymed/drugInfo.cfm?setid=ee06186f-2aa3-4990-a760-757579d8f77b) - [STEP 1](https://pubmed.ncbi.nlm.nih.gov/33567185/) - [SURMOUNT-1](https://pubmed.ncbi.nlm.nih.gov/35658024/) - [Source: STEP 1 withdrawal extension](https://pubmed.ncbi.nlm.nih.gov/35441470/) ## Related reading - [What BMI Do You Need to Qualify for Semaglutide?](/blog/bmi-for-semaglutide/) - [What to Expect During Your First Month on Semaglutide](/blog/first-month-on-semaglutide/) - [GLP-1 Eligibility: Do You Qualify?](/blog/glp1-eligibility-requirements/) ## About this article Published by REMEVi, a telehealth business offering paid treatment programs. REMEVi has a commercial interest in the services discussed here. Educational content supports informed conversations with a licensed clinician; it does not determine your eligibility or replace individual care.