GLP-1 Medications: What They Are, How They Work, and Who They’re For

By Mohsen Halaby, MD

Board-Certified in Internal Medicine

Founder, Carebridge Medical

Serving Patients in Ohio & California

If you’ve heard about “GLP-1 shots” for diabetes or weight loss, you’re not alone. Medications like Semaglutide and Tirzepatide have changed how we treat type 2 diabetes and obesity. But what exactly are they—and are they right for you?

As a board-certified internal medicine physician, I’ve seen firsthand how powerful these medications can be when used appropriately and safely.

What Is GLP-1?

GLP-1 (glucagon-like peptide-1) is a natural hormone released from your gut after you eat. It helps regulate:

• Blood sugar

• Insulin secretion

• Glucagon suppression

• Stomach emptying

• Appetite and satiety (feeling full)

GLP-1 medications mimic this hormone—enhancing your body’s natural ability to control glucose and reduce hunger.

How Do GLP-1 Medications Work?

They act in several key areas:

1️⃣ Pancreas

• Increase insulin release (only when glucose is elevated)

• Decrease glucagon (reduces liver glucose output)

2️⃣ Brain

• Reduce appetite and cravings

• Increase satiety

3️⃣ Stomach

• Slow gastric emptying → steadier blood sugar after meals

This multi-system effect explains why these medications help with both diabetes control and weight reduction.

FDA-Approved GLP-1 Medications

Here are commonly prescribed options:

• Ozempic – Type 2 diabetes

• Wegovy – Weight management

• Mounjaro – Type 2 diabetes

• Zepbound – Weight management

Tirzepatide is technically a dual GIP/GLP-1 agonist, which may enhance weight loss effects.

Benefits Beyond Weight Loss

Studies show GLP-1 medications may:

• Lower A1C by 1–2% (sometimes more)

• Reduce body weight by 10–20% in some patients

• Lower cardiovascular risk in high-risk patients

• Improve blood pressure and lipid profiles

For many patients, this is more than cosmetic weight loss—it’s metabolic risk reduction.

Common Side Effects

Most are gastrointestinal and improve over time:

• Nausea

• Constipation

• Diarrhea

• Reduced appetite

Rare but important considerations:

• Pancreatitis history

• Gallbladder issues

• Personal/family history of medullary thyroid cancer (contraindicated)

Proper dosing and gradual titration reduce side effects significantly.

Who Is a Good Candidate?

You may qualify if you have:

• Type 2 diabetes

• BMI ≥30

• BMI ≥27 with metabolic conditions (hypertension, prediabetes, dyslipidemia)

• Insulin resistance

• Difficulty losing weight despite lifestyle changes

These medications work best when combined with:

• Adequate protein intake

• Resistance training

• Sleep optimization

• Sustainable nutrition

Are GLP-1 Medications a “Forever Drug”?

That depends.

Obesity and type 2 diabetes are chronic conditions. Stopping medication without lifestyle structure often leads to weight regain. The goal isn’t temporary weight loss—it’s long-term metabolic health.

Final Thoughts

GLP-1 medications represent one of the most important advances in metabolic medicine in decades. When used thoughtfully, they can:

✔ Improve blood sugar

✔ Reduce weight

✔ Lower cardiovascular risk

✔ Improve quality of life

But they are not magic. They are tools—and like all tools, they work best with proper medical supervision.

Want to Learn More?

At Carebridge Medical, we provide physician-led virtual metabolic and weight management care for adults in Ohio and California. If you’re curious whether GLP-1 therapy is right for you, we can help you evaluate your goals, labs, and medical history safely.

This blog is for educational purposes only and does not constitute medical advice. Always consult a licensed healthcare professional before starting any medication.