Weight Loss Medication Q & A with Long Island Dietitian Nutritionist

As a dietitian nutritionist with over 30 years of experience working with patients on Long Island and throughout New York, I closely follow the latest medical advancements and evidence-based research. One of the most common topics I’m asked about is weight loss medication—their effectiveness, potential side effects, and whether they can help sustain long-term weight loss.

If you’re considering weight loss medication, it’s essential to consult with your healthcare provider and to review the science from credible sources such as Harvard Health, Mayo Clinic, and the American Dietetic Association.

How Do Weight Loss Medications Work?

Prescription weight loss medications typically function in one or more of the following ways:

Suppressing appetite
Increase feelings of fullness
Blocking fat absorption
Targeting food cravings

What Drugs are Approved for Weight Loss?

Six weight-loss drugs have been approved by the U.S. Food and Drug Administration (FDA) for long-term weight management:

Wegovy (semaglutide) – A weekly injection approved in 2021 specifically for weight loss. It contains the same active ingredient as Ozempic, which is prescribed for type 2 diabetes.
Zepbound (tirzepatide) – Approved in 2023 for weight loss. Its active ingredient is also found in Mounjaro, another diabetes medication for type 2 diabetes.
Olistat (xenical) – Designed for short-term use, this medication blocks fat absorption. A lower-dose version is available over the counter under the name Alli.
Contrave (bupropion & naltrexone) An oral medication taken with a low-fat meal. It should be taken as directed by your health care provider.

What are the Side Effects of Weight Loss Medication?

As with any medication, side effects are possible. Common side effects may include:

Loss of lean body mass (muscle)
Gastrointestinal symptoms: nausea, constipation, diarrhea, reflux, bloating, or abdominal pain
Fatigue
Headaches
Increased heart rate
Mood changes
Sleep disturbances

While these medications have undergone rigorous testing by the Food & Drug Administration and are generally considered safe when prescribed and used as directed, it’s important to work closely with your physician to monitor your progress and manage any side effects.

How to Attain and Sustain your Optimal Weight When Taking a Weight Loss Medication?

Weight loss medications can be powerful tools, but they are not magic solutions. They work best when paired with long-term, sustainable lifestyle changes. Lasting weight loss requires:

Consistent, balanced nutrition
Mindful eating habits
Behavior changes
Physical activity
Support and accountability

Using medication without addressing the root causes of weight gain often leads to weight regain once the medication is discontinued.

What is a Dietitian’s Role in Supporting Patients Taking Weight Loss Medication?

As a dietitian, Nancy’s role is to support and guide you throughout your weight loss journey—whether or not you are taking medication. Together, you’ll create a plan that fits your life, your preferences, and your goals.

During your initial consultation, I’ll evaluate:

Your dietary patterns and weight history
Your personal goals
Your home, work, and social environment
Your habits—both helpful and harmful

Personalized Nutrition Counseling Includes:

Identifying dietary challenges and developing solutions
Designing a customized food and lifestyle plan
Encouraging realistic behavior changes
Offering education, motivation, and support

When you work with Nancy, she’ll develop a practical, sustainable, and enjoyable path to better health—whether that includes medication or not.