GLP-1 Medications: What You Should Know Before Starting Treatment

GLP-1 (glucagon-like peptide-1) receptor agonists have transformed the treatment of obesity and type 2 diabetes by helping patients lose weight, improve blood sugar control, and reduce the risk of obesity-related diseases. While these medications can be highly effective, they work best when combined with healthy nutrition, regular physical activity, and long-term lifestyle changes.

This guide answers some of the most common questions about GLP-1 medications and what patients should know before beginning treatment.

Key Takeaways

• GLP-1 medications help regulate appetite, slow stomach emptying, and improve blood sugar control.
• These medications are intended to be used alongside healthy nutrition and exercise—not as a replacement for them.
• Weight regain is common if medication is discontinued without long-term lifestyle changes.
• Rapid weight loss may contribute to muscle loss, loose skin, hair shedding, and nutritional deficiencies if not properly managed.
• Regular follow-up with your healthcare provider is important to monitor progress, side effects, and overall health.

What Is a GLP-1 Medication and How Does It Work?

GLP-1 receptor agonists mimic a naturally occurring hormone released by your intestines after eating. They help regulate appetite and blood sugar by:

• Increasing feelings of fullness
• Slowing stomach emptying
• Reducing hunger and food cravings
• Improving insulin release when blood sugar is elevated
• Decreasing glucagon production, which helps lower blood sugar

Together, these effects allow many patients to consume fewer calories while maintaining better blood sugar control.

Common GLP-1 Medications

Examples include:

• Wegovy®
• Ozempic®
• Zepbound®
• Mounjaro®
• Saxenda®
• Victoza®

Your provider will determine which medication is appropriate based on your medical history, health goals, and insurance coverage.

What Are the Potential Side Effects?

Most side effects occur as your body adjusts to treatment and improve over time.

Common side effects include:

• Nausea
• Vomiting
• Constipation
• Diarrhea
• Heartburn
• Bloating
• Fatigue
• Decreased appetite

Less commonly, patients may experience:

• Hair shedding associated with rapid weight loss
• Gallbladder disease
• Pancreatitis (rare)
• Dehydration
• Muscle loss if adequate protein intake and resistance exercise are not maintained

Always contact your healthcare provider if you experience severe abdominal pain, persistent vomiting, or symptoms that concern you.

What Should You Know Before Starting?

GLP-1 medications are powerful medical tools—not quick fixes.

Successful treatment includes:

• Setting realistic expectations
• Following a balanced, protein-rich diet
• Staying well hydrated
• Participating in regular physical activity
• Incorporating strength training to preserve lean muscle
• Keeping scheduled follow-up appointments

Your provider may recommend periodic laboratory testing and nutritional counseling throughout treatment.

Does the Weight Come Back If You Stop?

It can.

Research has shown that many patients regain a significant portion of their lost weight after discontinuing GLP-1 therapy if healthy habits are not maintained.

Long-term success depends on:

• Sustainable nutrition
• Regular exercise
• Muscle preservation
• Behavioral changes
• Continued medical follow-up

GLP-1 medications should be viewed as one component of a comprehensive weight management plan rather than a standalone solution.

What GLP-1 Medications Do Not Address

Although GLP-1 medications are highly effective for weight loss, they do not directly treat many of the physical changes that accompany rapid weight loss.

These may include:

• Loose or sagging skin
• Facial volume loss
• Loss of collagen and skin elasticity
• Muscle loss
• Hair thinning
• Reduced skin hydration
• Changes in body composition

These concerns often require additional nutritional support, resistance training, or other medical and aesthetic treatments.

The Importance of Nutrition

Proper nutrition plays a critical role in preserving muscle, supporting metabolism, and maintaining healthy skin during weight loss.

Focus on:

• Adequate daily protein intake
• Hydration
• Fruits and vegetables
• Fiber-rich foods
• Healthy fats
• Strength training
• Vitamin and mineral intake as recommended by your healthcare provider

Meeting your nutritional needs helps reduce muscle loss while supporting overall health and long-term weight maintenance.

How Our MedSpa Can Support Your Skin During Weight Loss

Significant weight loss can improve overall health while also leading to changes in skin quality, facial volume, and collagen production. Our physician-directed MedSpa offers advanced collagen-stimulating and skin rejuvenation treatments designed to complement your medical weight loss journey.

Depending on your goals, treatments such as DENSITY™ by JEISYS, Edge ONE™ Polish CO₂ Refresh, advanced laser resurfacing, and physician-recommended skincare may help improve skin firmness, texture, and overall skin health following weight loss.

Our medical and aesthetic teams work together to provide comprehensive care, supporting both your health and your confidence throughout your weight loss journey.