If you’re thinking about starting GLP-1 treatment soon, you probably want to know what those first weeks will actually feel like. This guide walks through what’s typical early on. We’ll explore common side effects, how to manage them, and when you can expect results.

‍

Understanding GLP-1 RAs

GLP-1 is a hormone your body produces naturally that helps manage appetite, blood sugar, and digestion. What many people call GLP-1 treatment or “taking GLP-1s” refers to a class of medications called GLP-1 receptor agonists (GLP-1 RAs). 

GLP-1 RAs work by binding to and activating GLP-1 receptors, mimicking how the hormone acts in the body. This produces a handful of effects, such as:

• Suppressing appetite by interacting with parts of the brain that regulate hunger, making you feel full (satiated) longer. 
• Delaying gastric emptying, meaning food leaves the stomach more slowly, limiting post-meal blood sugar spikes and also supporting satiety. 
• Signaling insulin secretion, prompting the pancreas to release insulin when glucose levels rise, regulating blood sugar. 
• Suppressing glucagon, a hormone that signals the liver to release stored glucose between meals and after exercise, preventing blood sugar spikes. 

What to do before starting a GLP-1 RA

Any GLP-1 RA treatment plan starts with a conversation with your doctor. Before prescribing, they’ll assess your full health picture to determine if the medication is suitable for you. 

This involves considering several factors, including*: 

• Baseline eligibility: Every U.S. Food and Drug Administration (FDA)-approved product has eligibility criteria. Your doctor has the final say over what’s suitable, so not meeting these criteria doesn’t automatically disqualify you from taking them. 
• Reproductive plans: If you’re hoping to become pregnant, stop taking GLP-1s before trying to conceive. Research on the safety of GLP-1 medication use while pregnant is still ongoing. But most medicine labels currently suggest going off of treatment before getting pregnant. Stop taking semaglutide (Ozempic®, Wegovy®) at least two months before a planned pregnancy and tirzepatide (Zepbound®, Mounjaro®) one month beforehand. These timelines give your body enough time to wash the medicine out of your system before getting pregnant. While you’re breastfeeding, don’t restart GLP-1s without talking to your doctor. Researchers don’t know for sure whether the medication can pass into breast milk, so it may be better to wait until you’re done breastfeeding to continue treatment. Your doctor will help you navigate options that support your baby’s well-being while helping you achieve your treatment goals. 
• Contraindications: FDA-approved products come with a list of “contraindications,” or conditions and circumstances that make a medication unsafe for you. If any GLP-1 RA contraindications apply to you, your doctor will recommend an alternative. 
• Current medications: Some medications can interact with GLP-1 RAs, either by raising the risk of side effects or by making one of the medications less effective. For example, GLP-1 RAs can affect the absorption of some oral contraceptives.
• Laboratory tests: Your provider will likely order lab work to check things like your blood sugar and kidney function. These results help flag any risk of complications and guide which GLP-1 RA (if any) is the right fit for you.

But effective GLP-1 care extends beyond just writing you a prescription. Your doctor will place the right team of clinicians in your corner to support sustainable weight loss. As Denise, a Maven Clinic patient, puts it:

"My in-person doctors are great, but they can't compete with the entire team I can meet with on Maven. I've met with a Wellness Coach, Physical Support coach, OB-GYN, Career Coach, Naturopath, and many more. My daughter calls them my “entourage” during my Taylor Swift Menopause era."

‍

What can I expect when starting a GLP-1 RA?

Several factors can impact what you’ll experience when starting GLP-1 treatment, from which medication you’re taking to whether you have any underlying health concerns.
As an example of the kinds of things you might experience, we’ve laid out the standard titration schedule for Wegovy® (semaglutide) pen injections:

• Month one: Start on a low dose of 0.25 mg. Patients commonly experience side effects such as acid reflux, nausea, and constipation during this first month. 
• Month two: Increase to 0.5 mg. Side effects may flare up again every time your dose increases. This is normal. 
• Month three: Step up to 1 mg. Many patients begin to notice changes in their body weight by this point. 
• Month four: Raise to 1.7 mg. In some patients, higher doses go hand-in-hand with heightened side effects, though individual experiences vary. 
• Month five: Reach 2.4 mg, the standard Wegovy® maintenance dose. You’ll likely stay at this dose moving forward, though your doctor may decide to raise it depending on your body’s response.

For other GLP-1 RAs, this timeline can look different. Take Saxenda® (liraglutide), for example. Dose increases happen weekly rather than monthly, with patients typically reaching their maintenance dose by week five. Whatever medication you use, your doctor will help shape expectations based on your unique care plan.

‍

How quickly do GLP-1 RAs start working?

GLP-1 RAs start working from the first dose. Many patients notice effects like appetite suppression as soon as the first days of treatment, though for others it can take a few weeks. It’s important to remember that timelines vary.

Steady state is a key part of this equation. This means the medication has reached a consistent concentration. When you arrive at steady state on your maintenance dose, the medication has reached full exposure in the body. The time it takes to reach this mark varies meaningfully among GLP-1 RAs, ranging from days to months. 

As a general principle, the exposure you reach at steady state is what’s expected to produce the medication’s intended effect. However, some patients may still begin noticing results prior to reaching it. 

‍

What side effects can I expect when starting a GLP-1 RA?

Gastrointestinal (GI) upsets are the most common side effects of starting GLP-1 RAs. These include: 

• Nausea
• Diarrhea
• Vomiting
• Constipation
• Dyspepsia (indigestion)
• Abdominal pain

Non-GI-related side effects can include headaches, fatigue, and dizziness. Side effects tend to appear early on in the treatment cycle, especially following a dose increase. They’re typically mild-to-moderate and ease as your body adjusts to the medication. 

‍

Tips for navigating early treatment stages

Here are a few tips for navigating the early stages of treatment:

• Side effect management: Speak to your doctor about how you can lessen the impact of various side effects. For example, practicing mindful eating and pacing your meals can reduce the likelihood of nausea by avoiding stomach overfilling. 
• Treatment adherence: Sticking closely to your care plan will help you see the best results from your treatment. Make sure you’re aware of what to do if you miss a dose.
• Getting support: Starting a GLP-1 medication comes with a lot of new things to manage, and you don’t have to figure it out on your own. If side effects are severe or aren’t easing up, tell your provider. They can help adjust your dose, suggest ways to manage symptoms, or decide whether a different approach makes sense.

Supporting your GLP-1 journey, step-by-step

Effective GLP-1 care goes beyond just writing a prescription. At Maven Clinic, our specialists are by your side at every step of your journey, supporting long-term, sustainable outcomes. With their help, you’ll be able to navigate the early stages of treatment and everything that follows with confidence.

Learn more about our approach to GLP-1 care today.