<section class="ondra-article-page"> <div class="ondra-article-hero"> <div class="ondra-article-container"> <div class="ondra-article-meta-row"><span class="ondra-meta-pill">⏱ 7 min read</span><span class="ondra-meta-pill">Updated July 2026</span></div> <h1 class="ondra-article-title">Week 1 and Week 2 on a GLP-1: What's Normal and What to Watch For</h1> <p class="ondra-article-intro">The first two weeks on compounded semaglutide or tirzepatide are an adjustment period. Appetite changes, mild side effects, and slower-than-expected weight change are all common — and most of it is your body adapting to a starting dose. This guide covers what patients commonly experience in weeks one and two, what tends to help, and which symptoms warrant contacting a provider rather than waiting them out.</p> </div> </div> <div class="ondra-article-container ondra-article-body"> <div class="ondra-article-layout" id="ondraArticleLayout"> <div class="ondra-article-main" id="ondraArticleMain"> <a href="/blog" class="ondra-back-link">← Back to all articles</a> <div class="ondra-takeaways-card"> <h2 class="ondra-card-heading">Key takeaways</h2> <div class="ondra-takeaway-item"><span class="ondra-check"><svg width="16" height="16" viewBox="0 0 16 16" fill="none"><circle cx="8" cy="8" r="7" stroke="currentColor" stroke-width="1.4"/><path d="M4.5 8.5L6.5 10.5L11.5 5.5" stroke="currentColor" stroke-width="1.5" stroke-linecap="round" stroke-linejoin="round"/></svg></span><p>The starting dose is meant to let your body adjust, not to drive rapid weight loss. Slow early change is expected.</p></div> <div class="ondra-takeaway-item"><span class="ondra-check"><svg width="16" height="16" viewBox="0 0 16 16" fill="none"><circle cx="8" cy="8" r="7" stroke="currentColor" stroke-width="1.4"/><path d="M4.5 8.5L6.5 10.5L11.5 5.5" stroke="currentColor" stroke-width="1.5" stroke-linecap="round" stroke-linejoin="round"/></svg></span><p>Reduced appetite is the medication working — but it makes protein and hydration something to be deliberate about.</p></div> <div class="ondra-takeaway-item"><span class="ondra-check"><svg width="16" height="16" viewBox="0 0 16 16" fill="none"><circle cx="8" cy="8" r="7" stroke="currentColor" stroke-width="1.4"/><path d="M4.5 8.5L6.5 10.5L11.5 5.5" stroke="currentColor" stroke-width="1.5" stroke-linecap="round" stroke-linejoin="round"/></svg></span><p>Severe abdominal pain, persistent vomiting, or signs of an allergic reaction are not part of normal adjustment — seek medical care promptly.</p></div> </div> <div class="ondra-section"> <h2>What's normal in the first two weeks?</h2> <p>The most common early experience is a noticeable drop in appetite — meals feel filling sooner, and food may become less interesting. Many patients also report mild nausea (especially in the day or two after an injection), fatigue, constipation or looser stools, and mild tenderness at the injection site.</p> <div class="ondra-info-card"> <p class="ondra-info-title">Why weight change may be slow at first</p> <p>You start at the lowest dose deliberately, so your body can adapt before the dose increases. That starting dose isn't primarily intended to produce rapid weight loss. Early weight change also fluctuates with water, sodium, and digestion. Judging progress after two weeks is judging it far too early.</p> </div> </div> <div class="ondra-section"> <h2>How do I manage early nausea?</h2> <p>Nausea is the most frequently reported early side effect, and it commonly eases as your body adjusts. What tends to help: eating smaller portions more frequently rather than large meals, stopping when you feel full instead of finishing out of habit, avoiding very greasy or heavy foods, staying hydrated throughout the day, and not lying down immediately after eating.</p> <p>If nausea is severe, persistent, or preventing you from keeping fluids down, that's worth contacting a provider about rather than pushing through. Your provider can adjust your plan, including slowing your titration.</p> </div> <div class="ondra-section"> <h2>What should I be eating and drinking?</h2> <p>Because appetite drops, patients often eat significantly less without planning for it — which can leave protein and fluid intake too low. Make protein the anchor of each meal so you're getting adequate intake even from smaller portions, and drink water consistently through the day rather than relying on thirst, which can be blunted.</p> <p>Constipation is common early on. Fiber, fluids, and movement all help. If it becomes persistent or uncomfortable, ask your provider before starting any new remedy.</p> </div> <div class="ondra-section"> <h2>When should I contact a provider?</h2> <p>Mild, improving symptoms are typical of adjustment. Contact a provider promptly if you experience severe or persistent abdominal pain (particularly pain radiating to the back), persistent vomiting or inability to keep fluids down, signs of an allergic reaction such as rash, swelling, or difficulty breathing, or any symptom that feels severe or is getting worse rather than better.</p> <p>For anything urgent or emergent, seek immediate medical care rather than messaging and waiting for a reply. For non-urgent questions, message your care team through the <a href="https://care.ondra.health" target="_blank" rel="noopener">patient portal</a>.</p> </div> <div class="ondra-section"> <h2>Should I be weighing myself?</h2> <p>If tracking helps you, weigh at a consistent time — most people choose morning, after using the bathroom, before eating. But daily weight swings reflect water, sodium, and digestion far more than fat change, so a single day's number carries little meaning. Watching the trend over weeks is more useful than reacting to daily readings. If weighing frequently makes you anxious, weighing weekly or not at all is a legitimate choice.</p> </div> <div class="ondra-section"> <h2>Frequently asked questions</h2> <div class="ondra-faq-item"><h3>What's normal in the first two weeks on a GLP-1?</h3><p>A noticeable drop in appetite is the most common experience. Many patients also report mild nausea (especially after an injection), fatigue, constipation or looser stools, and mild injection-site tenderness. These often ease as your body adjusts to the starting dose.</p></div> <div class="ondra-faq-item"><h3>Why am I not losing weight in the first two weeks?</h3><p>You start at the lowest dose so your body can adapt before increasing, and that starting dose isn't primarily intended to produce rapid weight loss. Early weight also fluctuates with water, sodium, and digestion. Two weeks is too early to judge progress.</p></div> <div class="ondra-faq-item"><h3>How do I manage nausea when starting semaglutide or tirzepatide?</h3><p>Eat smaller portions more frequently, stop when full, avoid very greasy or heavy foods, stay hydrated through the day, and avoid lying down right after eating. Nausea commonly eases with adjustment. If it's severe, persistent, or you can't keep fluids down, contact a provider — they can slow your titration.</p></div> <div class="ondra-faq-item"><h3>What should I eat when my appetite drops?</h3><p>Make protein the anchor of each meal so smaller portions still deliver adequate intake, and drink water consistently rather than waiting for thirst, which can be blunted. Fiber, fluids, and movement help with the constipation that's common early on.</p></div> <div class="ondra-faq-item"><h3>When should I contact a provider about side effects?</h3><p>Contact a provider promptly for severe or persistent abdominal pain (especially radiating to the back), persistent vomiting or inability to keep fluids down, signs of an allergic reaction such as rash, swelling, or difficulty breathing, or any symptom that's severe or worsening. For urgent symptoms, seek immediate medical care.</p></div> </div> <p class="ondra-disclaimer">† This article is for informational purposes only and does not constitute medical advice. Ondra Health is a telehealth platform, not a medical provider, and does not prescribe or compound medication. This content does not establish a provider-patient relationship or replace personalized guidance from a licensed professional. Prescriptions are issued by licensed providers at Wasef Health, PC, an independent practice. Compounded medications are not FDA-approved and are not reviewed by the FDA for safety, effectiveness, or quality before marketing. Seek prompt medical attention for severe or concerning symptoms, including severe abdominal pain, persistent vomiting, or signs of an allergic reaction. Individual results vary.</p> </div> <aside class="ondra-article-sidebar" id="ondraSidebarCol"> <div class="ondra-sidebar-track" id="ondraSidebarTrack"> <div class="ondra-sidebar-card-wrap" id="ondraSidebarWrap"> <div class="ondra-sidebar-card" id="ondraSidebarCard"> <div class="ondra-sidebar-top"> <p class="ondra-sidebar-eyebrow">ONDRA HEALTH</p> <h3>Adjusting to treatment?</h3> </div> <div class="ondra-sidebar-bottom"> <div class="ondra-sidebar-item"><span>✔</span><p>Message your provider about side effects</p></div> <div class="ondra-sidebar-item"><span>✔</span><p>Titration can be slowed if you need it</p></div> <div class="ondra-sidebar-item"><span>✔</span><p>Prescriptions via Wasef Health, PC</p></div> <div class="ondra-sidebar-item"><span>✔</span><p>Ongoing provider support</p></div> <a href="https://care.ondra.health/login" class="ondra-sidebar-button">Open patient portal <span aria-hidden="true">→</span></a> <p class="ondra-sidebar-note">Seek immediate care for severe or urgent symptoms.</p> </div> </div> </div> </div> </aside> </div> </div> </section> <script type="application/ld+json"> {"@context":"https://schema.org","@type":"FAQPage","mainEntity":[{"@type":"Question","name":"What's normal in the first two weeks on a GLP-1?","acceptedAnswer":{"@type":"Answer","text":"A noticeable drop in appetite is the most common experience. 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