Qsymia vs. Phentermine: Comparing Two Prescription Appetite Suppressants

Finding the right solution for weight loss can be challenging. Prescription appetite suppressants, such as Qsymia and Phentermine, offer promising options for individuals struggling to lose weight through diet and exercise alone.

At InShapeMD, we understand the importance of choosing the right medication to complement your weight loss journey. That’s why we offer not one or two but four appetite suppressants to aid your efforts.

Today, we’ll be limiting ourselves to Qsymia and Phentermine to help you make an informed decision.

What Are Prescription Appetite Suppressants?

Prescription appetite suppressants are FDA-approved medications designed to reduce hunger and help control cravings, making it easier to adhere to a calorie-restricted diet.

They are typically recommended for individuals with a BMI of 30 or higher or those with a BMI of 27 or higher who have weight-related health issues such as diabetes or hypertension.

Both Qsymia and Phentermine fall into this category but differ in their composition, efficacy, and side effects.

Phentermine: The Basics

Invented in 1959, Phentermine is one of the oldest and most widely used appetite suppressants in our country. It works by stimulating the central nervous system, which increases heart rate and blood pressure while decreasing appetite.

Phentermine is typically prescribed for short-term use, usually up to 12 weeks, due to its potential for dependence and side effects.

Pros of Phentermine

  • Efficacy: Many studies have shown that Phentermine is effective in promoting weight loss when combined with diet and exercise.
  • Cost: Phentermine is generally more affordable than many other weight loss
  • Quick Results: Users often see rapid weight loss, which can be motivating.

Cons of Phentermine

  • Side Effects: Common side effects include dry mouth, insomnia, dizziness, and increased heart rate.
  • Short-Term Use: Phentermine is not intended for long-term use, and weight regain is possible after discontinuation.

Qsymia: A Combination Approach

A Before and After Image Showing a Woman Before and After Prescription Appetite Suppressants

Qsymia combines Phentermine with Topiramate, a medication initially used to treat epilepsy and migraines. This combination aims to enhance phentermine’s appetite-suppressing effects while mitigating some of its side effects and improving overall efficacy.

Pros of Qsymia

  • Enhanced Efficacy: The combination of Phentermine and Topiramate has been shown to result in greater weight loss compared to Phentermine alone.
  • Long-Term Use: Qsymia is approved for long-term use, allowing for sustained weight loss and maintenance.
  • Additional Benefits: Topiramate may provide additional benefits, such as mood stabilization and reduced cravings for unhealthy foods.

Cons of Qsymia

  • Side Effects: Side effects can include tingling in the hands and feet, dizziness, altered taste, insomnia, and constipation.
  • Cost: Qsymia is more expensive than Phentermine, which may be a barrier for some patients.
  • Prescription Requirements: Qsymia may require more stringent prescribing guidelines and follow-up.

Making the Right Choice

When deciding between Qsymia and Phentermine, you must consider your individual health needs, weight loss goals, and potential side effects.

Here at InShapeMD, we offer scheduled consultations to help you determine the best prescription appetite suppressant for your situation. Both medications have unique advantages and potential drawbacks, and the right choice will depend on your specific circumstances.

Our experienced healthcare professionals will guide you through the process, ensuring that you receive the most appropriate and effective treatment plan for your needs and pre-existing condition(s). Whether you opt for Qsymia, Phentermine, or another solution, our team is here to support you every step of the way.

Contact us today to start your journey towards a healthier, happier you.


We are passionate about empowering people in their weight loss journey. Experience real transformation with InShapeMD in San Angelo, Texas. Schedule a FREE consultation to get started today.