GLP-1 Side Effects: Your Guide to Feeling More Prepared

Starting a GLP-1 medication can come with a few surprises. And we're not just talking about changes in your appetite.

Nausea, constipation and fatigue are among the side effects people may experience, especially when starting treatment or increasing their dose. The good news? There are practical steps that may help you manage some of these symptoms.

From what to eat to when to call your provider, here's what you should know about navigating common GLP-1 side effects.

First, Why Do GLP-1 Side Effects Happen?

A quick science lesson (we promise to keep it short).

GLP-1 stands for glucagon-like peptide-1, a hormone your body naturally releases after eating. GLP-1 medications mimic some of its effects, helping regulate appetite and slowing how quickly food moves out of your stomach.

That slower digestion is one reason some people experience nausea, constipation or other digestive symptoms.

According to FDA prescribing information, gastrointestinal side effects are common with several GLP-1 medications, particularly when starting treatment or increasing a dose.

For some people, symptoms improve as their body adjusts. For others, they may stick around longer.

The takeaway? Your eating habits may need a few adjustments, too. Sometimes, it's not just what you're eating, but how much and how quickly.

Feeling Queasy? Let's Talk Nausea.

Nausea is one of the most reported GLP-1 side effects. And while it's not exactly anyone's favorite feeling, a few changes to your eating routine may help.

Try these tips:

• Think smaller portions. Eating smaller meals throughout the day may feel more comfortable than sitting down to three large ones.
• Slow your roll. Take your time eating and pay attention to when you start feeling satisfied.
• Keep it simple. Bland, lower-fat foods like crackers, toast, rice or bananas may be easier to tolerate.
• Go easy on greasy foods. Fried, high-fat or very sweet foods may make nausea worse for some people.
• A few other things worth trying: Avoid lying down immediately after meals, give yourself some time between dinner and bedtime, and try sipping fluids between meals instead of drinking large amounts while eating.
• It can also help to keep track of when nausea happens. Is it after certain foods? Larger meals? A dose increase? Sharing those patterns with your provider can help them better understand what you're experiencing.
• And remember: If nausea makes it difficult to eat or drink, reach out to your care team.

Constipation? Let's Get Things Moving.

Let's talk about something nobody loves talking about: constipation.

Because GLP-1 medications can slow digestion, bowel movements may become less frequent. Eating less overall can also play a role.

Fortunately, a few everyday habits may help support regularity.

Here's where to start:

• Add fiber gradually. Fruits, vegetables, beans, oats and whole grains are great sources. Just don't go from zero to fiber hero overnight, since increasing too quickly can cause bloating or gas.
• Keep water close. Staying hydrated helps support normal bowel function, especially when you're increasing fiber.
• Get moving. Even a short walk after meals may help encourage bowel activity.
• Stick to a routine. Giving yourself a consistent time to use the bathroom may help.
• Not feeling particularly thirsty? Try keeping a water bottle nearby or adding water-rich foods like cucumber, melon or soup to your meals.
• If constipation continues, don't just tough it out. Talk to your provider or pharmacist before trying laxatives, stool softeners or fiber supplements. They can help you figure out what's appropriate for your situation.

Running on Empty? Here's What to Know About Fatigue.

Feeling more tired than usual?

Fatigue can happen during GLP-1 treatment, although the cause isn't always the medication itself. Eating less, dehydration, changes in sleep and other health factors may all contribute.

If your energy has taken a dip, it may be worth checking in on a few basics.

A few things that may help:

• Make your meals count. With a smaller appetite, prioritize nutrient-rich foods, including protein, fruits, vegetables and whole grains.
• Don't forget to hydrate. Dehydration can contribute to fatigue and headaches.
• Give sleep some attention. Consistent bedtimes and wake-up times can support healthy sleep habits.
• Find your balance. Movement matters, but so does rest. Adjust your activity based on how you're feeling.
• One thing to watch for is going too long without eating. When your appetite changes, it can be easy to unintentionally skip meals or eat less than your body needs.
• Setting reminders for small, balanced meals may help you stay on top of your nutrition.

If fatigue continues or gets worse, let your provider know.

When Side Effects Need More Than a Few Lifestyle Tweaks

Some GLP-1 side effects may be manageable at home. Others need medical attention. Knowing what to watch for is an important part of taking care of yourself.

Seek emergency medical care if you experience:

• Severe, persistent abdominal pain, especially if it spreads to your back
• Difficulty breathing or swelling of your face, lips, tongue or throat
• Severe abdominal bloating with vomiting and an inability to pass stool or gas
• Severe, ongoing vomiting that prevents you from keeping fluids down — this also requires urgent medical evaluation, particularly if you're becoming dehydrated

Contact your provider promptly if you experience:

• Signs of dehydration, including dizziness, dark urine or urinating much less than usual
• Upper-right abdominal pain, fever or yellowing of your skin or eyes
• Nausea, constipation or fatigue that isn't improving or is getting worse
• Symptoms of low blood sugar, particularly if you take other glucose-lowering medications

These symptoms can sometimes signal more serious complications, including pancreatitis, gallbladder problems, or significant dehydration. This isn't a complete list of warning signs.

The bottom line: Don't wait for symptoms to become severe before reaching out. And never adjust your medication dose without guidance from your prescribing provider.

Your GLP-1 Side Effects Questions, Answered

Will GLP-1 side effects eventually go away?

They may. Some people notice side effects improve as their body adjusts to treatment, but everyone's experience is different. If symptoms continue or worsen, talk to your provider.

Can I take something over the counter for nausea or constipation?

Certain over-the-counter options may help, but check with your provider or pharmacist before taking anything new. They'll consider your health history and other medications.

Should I skip my next dose if I'm feeling sick?

Don't make changes to your dosing schedule on your own. Contact your prescribing provider for instructions based on your symptoms and treatment plan.

A Little Support Goes a Long Way

Navigating GLP-1 side effects can take some trial and error. What works for one person might not work for another, and that's okay.

Small adjustments to how you eat, hydrate, move and rest may help make certain symptoms easier to manage. Just as important? Knowing when it's time to get your medical team involved.

At OrderlyMeds, we believe informed patients are better equipped to have productive conversations about their care. If something doesn't feel right, reach out to your licensed provider. You don't have to figure everything out on your own.

This article is for educational purposes only and is not medical advice. Review your medication's prescribing information and Medication Guide, and consult your healthcare provider about your specific situation.