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Produced by NexGen, PhenRx is marketed as an over-the-counter solution of the popular prescription weight loss pill Phentermine.  The “Phen” from once popular Fen-Phen weight loss product.  Claiming that it is their “Best Selling Diet Supplement of 2016!” let’s take a look at how PhenRx stacks up.

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The ingredient list for PhenRx stands out in the diet pill industry for doing one very important thing…listing ingredients in its Fenphentamine HCL formulation.  Almost all others stop at the generic Fenphentamine HCL listing.  While they are nice enough give us the ingredients in their formulation, we still do not get to know the dosage of each ingredient.  Let’s take a closer look at the PhenRx ingredients.PhenRx ingredient label

  • 1,3,7 – Trimethylxanthine (Caffeine): Commonly known as caffeine, 1,3,7 – Trimethylxanthine is a clinically proven thermogenic meaning it gives you energy and increases your metabolism. This is an added source of caffeine so be cautious when using this product with coffee, soft drinks and/or energy drinks.
  • Beta-Phenylethylamine (PEA): Another stimulant, Beta-phenylethylamine has also been known to positively affect mood by affecting dopamine levels in the brain. The theory with this is a better mood equals less cravings and better appetite control.
  • Synephrine HCL: Commonly referred to as “bitter orange”, this ingredient increases metabolism and fat burning capabilities.
  • N,N-dimethyl-4-hydroxyphenylethylamine (Hordenine): A close compound to the more common Tyrosine, Hordenine is a central nervous system stimulant that makes it easier for your body pull stored fat and make it available for use or “burning” during exercise.
  • Schizandrol A: Commonly used for its ability to help brain function, Schizandrol A affects the neurotransmitters in the central nervous system.
  • Yohimbine HCL: Much preferred over yohimbe bark, Yohimbne HCL increases blood flow.

PhenRx Side Effects

PhenRx side effects have been reported very low with the most common being related to jitteriness, sleepiness or dry mouth.  This is likely because of stimulant intolerance or combining the product with other stimulants like coffee or energy drinks.  It is worth cautioning those with blood pressure issues, high and low and those on any prescription psyche drugs like antidepressants to consult your physician before taking this product.

Buy Direct from NexGen Labs

How to Use

Directions for taking PhenRx are very easy.  Just take one pill 30 minutes before breakfast and the second 30 minutes before lunch or dinner.  NexGen has developed a robust line around their PhenRx supplement, including PhenRx PM, PhenRx Patches and PhenRx Drops.

PhenRx PM

PhenRx PM is a complementary product from NexGen that is designed to be used in conjunction with Phen Rx.  It is designed with all natural ingredients that support a healthy metabolism but without the stimulants of the flagship product.  It also has ingredients to enhance REM sleep.  With no overlapping ingredients, NexGen did a good job at ensuring compatibility between these two products.
Click here to learn more about PhenRx PM.

PhenRx Patches

For those of us that prefer a sustained release for true all day support, NexGen has introduced the PhenRx Patch.  They are designed to give you the all day energy boost and appetite suppression.  Best when placed to either side of the bellybutton or on the upper thigh, these patches deliver 24-hour metabolism boost without having to remember a pill.  Click here to learn more about PhenRx patches.

PhenRx Drops

Specifically designed for the bioavailability of sublingual absorption, for instant uptake of the key nutrients.  The drops are most effective when used with PhenRx and/or PhenRx PM.  Click here to learn more about PhenRx drops.

Consider the PhenRx Ultimate Pack to combine all of these products for best results.

User Reviews

A quick look over to the NexGen website gives us some PhenRx reviews.

This is a bit too strong for me. I took one before breakfast(i know it says before lunch and dinner) and was not even slightly hungry at 2pm. But i was very jittery, like red bull jittery. I took another one at 4.30pm and now i feel jittery. I am prpbably a one pill a day kind of girl and will do at lunch time from now on. It is very hard to eat after taking this product. I am only deducting a star for the fact i am jittery and hot. Other then that i am definitely not hungry There are many phentermine alternatives out there, and I have tried mnay of them. I really like phenrx. I have been using it for 4 months and lost 47 lbs. Phentermine may have just a slight advantage in weight loss, however, phenrx has zero side effects for me.

As you can see favorable and honest review which is nice to see.  But the PhenRx stack gets only glowing marks probably because it was heavily marketed to existing users.

The drops and the patch make a difference.PhenRx Stack Review 1

Where to Buy

PhenRx can be purchased directly from the manufacturer at  You can also find some resellers on Amazon.  When you are deciding where to buy PhenRx, remember that anything not directly from NexGen will probably be more expensive with additional markup from the reseller.

Buy Direct from NexGen Labs

Conclusion – Does PhenRx Work?

While there may be some skepticism from not listing the amounts of each ingredient included in the NexGen PhenRx product, the ingredients are known to produce positive effects on metabolism and fat burning.  The known effectiveness of the ingredients along with the product reviews that can be found lead to the conclusion that when used properly this PhenRx should work.