Qysmia Vs Phentermine

Qsymia vs Phentermine: Which is More Effective?

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Qsymia is a popular prescribed weight loss pill in the USA, that has been approved by the FDA and currently prescribed in most states. It is commonly known as Qsiva in the UK.

However, Qsymia was rejected to be prescribed as a weight loss medication due to insufficient evidence. According to the European Medicines Agency, the high risks from Qsymia outweighs the benefits. And that’s why they required from the manufacturer Vivus to provide more case studies and proof of the safety of the pill on the long term usage.

Overview of Qsymia

Prescription drug: Yes

Designed For: Suppressing Appetite

Company Production: Vivus

Commercial Name in UK: Qsiva

Made in: USA

Date of Production: 2012

Scientific Evidence Behind Qsymia

It was based on a mixture of substance: Phentermine HCL &  Topiramate.

Its mechanism of action works by:

1- Releasing catecholamines which is a certain class of neurotransmitters that trigger your Epinephrine, Norepinephrine & Dopamine. Besides the many pleasures dopamine brings, this substance naturally suppresses appetite and aids weight loss.

2- The extra amount of catecholamines released in the body will increase the amount of leptin hormone in the blood. Leptin is a mediator of long-term regulation of energy balance, suppressing food intake and thereby inducing weight loss.

3- One of the side-effects that come with Topiramate is appetite suppression. Thus, it is included in Qsymia to aid in suppressing food cravings. It actually makes you find food less desirable and puts down your appetite.

What Are Qsymia Claims?

According to Vivus (the company behind Qsymia) it is designed to help obese people to lose weight. And since many obese patients are always under pressure of the high-risk factor of heart disease and diabetes. Thus, it is vital that you decide in consultation with your doctor whether using Qsymia is right for you or not.

Note: Many new drugs are released for public consumption before the risks are fully understood. 

The main issue behind the creation of this drug is that Phentermine is no longer generally prescribed in the UK.

Why Phentermine Is No Longer Prescribed in the UK?

With the rise of cases diagnosed with Cardiac problem after using Phentermine. NHS doctors and many others stopped prescribing it as a weight loss drug.

The cardiovascular side effects can be dangerous and unpredictable from a person to another. Such as increased heart rate, chest pain, or blood pressure changes. In addition, you may also be more likely to experience nervous system side effects such as dizziness, drowsiness, depression, and difficulty concentrating.

When Will Qsymia Be Available in The UK?

Qsymia is only available in US and still under investigations from UK authorities. It’s unlikely that it will be approved in the UK.

Of course, there are some clinics that are recommending safe legal alternatives to Qsymia and Phentermine.

So far the most common recommended weight loss supplement on the market is PhenQ.

This OTC weight loss drug is a combination of a fat burner, appetite suppressor and metabolic booster.

It is listed in the UK as an OTC drug, which means you can buy it online without prescription required.

Phenq- Sideeffects VS Qsymia

Comparing Qsymia With PhenQ

Product Qsymia

Qsymia reviews


PhenQ Phentermine

How it Works It targets catecholamines which gives an appetite suppressor feeling. It’s a thermogenic agent that raises internal body temperature and burn stored fats to energy. It also contains fibre-based ingredients which is known to help curb your appetite and delay the onset of hunger. The less time you spend eating, the less food you eat
Ingredients Phentermine HCL & Topiramate (both are 100% synthetic) There are the following main ingredients (100% natural):

– Caffeine (Improves thermogenesis)

– Capsimax Powder (Burns fat)

– Nopal (Appetite suppressant)

– Chromium Picolinate (Controlling carb and sugar cravings)

– Calcium Carbonate (Helps in maintaining optimal weight)

– L-Carnatine Furmarate (Changes the fats into energy)



The following conditions are contraindicated with this drug. Check with your physician if you have any of the following:


  • overactive thyroid gland
  • Diabetes
  • psychotic disorder
  • alcoholism
  • drug abuse
  • Increased Pressure in Eyes
  • Severe Uncontrolled High Blood Pressure
  • Mild High Blood Pressure
  • heart attack within the last 30 days
  • Acute Attack of Severe Constricting Chest Pain
  • abnormal heart rhythm
  • chronic heart failure
  • kidney disease with reduction in kidney function
  • pregnancy


Women who are pregnant or nursing should avoid using this product. This product is not meant to be consumed by children. If you have a pre-existing health problem, you may wish to speak with your health care provider before taking this product.
Side-effects Serious side-effects & must be taken under supervision with constant visits to your doctors. And never recommended for long-term usage.


It’s unlikely you’ll be dealing with side-effects simply because it’s 100% natural-based ingredients and non-synthetic.


However, it contains stimulants like caffeine so you might experience:

Sudden Energy boost.

Insomnia if u take it before you sleep, thus must avoid taking it in the evening time.

Prescription Required Not-Required in the UK
Ordering Online Not – Available (if found online it’s a scam and not real Qsymia) Available
User Reviews Many complained from side-effects & low to none weight loss results Positive Reviews (some even posted their before and after pictures)
Price £100 (For one-month dosage) (plus physicians visit fees) £45.95 (For one-month dosage) **Free Shipping** **There are ongoing offers on the official website**
Official Website Qsymia.com

Visit Official Website

My Conclusion

Qsymia has still a long way to get approved in the UK and Europe. In the USA, many still have several complains regarding its expensive pricing and side-effects. PhenQ has been demanded heavily in the UK market due to its major benefits outweigh its minor side-effects.

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Qsymia vs Phentermine: Which is More Effective?
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