Update: - Advertising Disclosure

Phen Rx Review - 12 Things You Need to Know

PhenRx claims to be a “highly effective, 100% all-natural product consisting of a blend of herbs and extracts that suppress appetite, increase metabolism and energy, and create an overall feeling of well-being.” Impressive claims, but our team followed the research supporting the claims.

NexGen, the company behind PhenRX, touts the formula as “clinical strength.” To get the facts you need, our research team focused on the ingredients’ benefits, potential side effects of the ingredients, and relevant research. Then, we gathered the facts to give you the bottom line.

Phen Rx can be purchased through their Official Site.

Phen Rx Readers: Noom is offering our readers a risk-free trial, for a limited time. Click here for more information!

What is PhenRx?

PhenRx is an over-the-counter weight-loss pill created and formulated and by U.S. based NexGen BioLabs Inc, headquartered in Tampa, Florida. NexGen offers various types of products ranging from dietary supplements to general health and beauty supplements.

NexGen BioLabs claims PhenRX suppresses the appetite and increases thyroid activity, raising the metabolic rate to promote fat loss. PhenRX is available as a diet pill or as a weight-loss patch.

The supplement also comes in multiple varieties, including Topical Patches, Weight-Loss Drops, and PhenRX PM.

The company specializes in over the counter supplements that they claim are “intended to be substituted for prescription medications.” PhenRX was designed and marketed as an alternative for those who don’t want to take a prescription weight-loss drug.

PhenRx is touted as a powerful fat burner that claims to have the benefits of reducing appetite, increasing metabolism, improving focus and energy levels, all while helping people to lose weight quickly – but what does the research say?

Phen Rx Competitors

Other similar products: , , PhenQ

PhenRX Ingredients

PhenRx ingredients include:

  • 1, 3, 7 – Trimethylxanthine
  • Beta-Phenylethylamine
  • Synephrine HCL
  • N-Dimethyl-4-hydroxyphenylethylamine
  • Schizandrol A
  • 5-Hydroxytryptophan
  • Yohimbe HCL

Other inactive ingredients include magnesium stearate and silicon dioxide.

1,3,7 – Trimethylxanthine

1,3,7 – Trimethylxanthine is the chemical name for caffeine, a stimulant found in foods such as coffee, tea, and cocoa. Research shows caffeine helps increase energy.


Beta-Phenylethylamine, or PEA, claims to help curb appetite, possibly.

N, N-dimethyl-4-hydroxyphenylethylamine

N, N-dimethyl-4-hydroxyphenylethylamine, also known as hordenine, may promote thermogenesis.


Synephrine, also known as bitter orange, is a stimulant connected to weight loss.

Yohimbine HCL

Yohimbine is an ingredient supposedly helping to relieve stress.

Schizandrol A

Phytotherapy Reviews, Schizandrol A, may have minor effects on cortisol and nitric ox9de levels, but additional research and large-scale studies must prove a connection.

5-Hydroxytryptophan (Also Known as 5-HTP)

According to Medical News Today, “A brain response for protein-rich foods was more likely to occur in those who took the 5-HTP supplement than in people who did not.”

PhenRX benefits

Benefits & Results

PhenRX Benefits and Results

NexGen Labs claims PhenRX will increase metabolism and thyroid activity while suppressing hunger for up to 24 hours.

While there are no clinical studies to back this claim made by NexGen, some users report the positive results from taking PhenRX.

Some users report a perceived increase in energy and mental focus as well as appetite reduction.

An increase in motivation to exercise is an important component of any successful weight-loss program.

While one of the pros of PhenRX may be that an increase in energy will help people want to exercise more, it is the reduction in appetite that accounts for much of the success of virtually all weight supplements.

It is almost universally the stimulants, or amphetamines, in weight-loss products that account for both these phenomena. Some of the pros of taking PhenRX include:

  • PhenRX includes some natural and herbal compounds.
  • PhenRX legal for over the counter use.
  • PhenRX has received positive reviews from some users.

Details on PhenRx and Weight Loss

When considering PhenRx and weight loss, one must consider results vary from person to person.

Our team focused on the ingredients’ benefits and found there’s research connecting some of the PhenRx ingredients to weight loss. For example, caffeine is a stimulant known to boost energy levels.


How to Take PhenRx

According to the directions printed on the bottle, you should take one capsule before lunch and one before dinner.

If you are an “advanced user,” the directions claim you may take a third capsule to suppress your appetite further.

Product Warnings

PhenRX Product Warnings

According to NexGen Labs, negative effects of PhenRX are uncommon but can include dry mouth and sleeplessness.

According to the label’s warnings, you should not use PhenRX if you are a child, have pre-existing medical conditions, and pregnant or nursing women.

You should never combine this supplement with alcohol. Stop using and get medical attention if you experience any side effects.

PhenRX side effects

Side Effects

PhenRx Side Effects

According to NexGen Labs, the side effects of PhenRx are negligible. However, some may notice side effects from PhenRx ingredients, including:

  • Fatigue
  • Sleeping issues
  • Jitters
  • Headaches
  • Nausea
  • Nervousness
  • Restlessness

PhenRX Lawsuits

There have been no lawsuits filed against NexGen Biolab.

Is PhenRX a Scam?

NexGen BioLabs appears to be a reputable company that manufactures a variety of quality dietary supplements. However, some issues may be considered red flags.

Consumers report having trouble getting in touch with customer service, and there have been some complaints listed against the company with the Better Business Bureau. Some of these complaints include:

  • Not being able to reach a live person by phone.
  • Not receiving products ordered off the NexGen Website.
  • Not being able to get a refund, even though the company offers a 30-day money-back guarantee.
  • The company either not responding to or resolving complaints.

It should be pointed out that just because there have been complaints against a company does not mean the business is a scam or isn’t legitimate.

Where to Buy

Where to Buy PhenRx

You can buy PhenRx from the official website and through other online retailers.

On the official website, you can purchase a month’s supply for $39.99. It is also available on Walmart.com for the same price.

Discounts are available on both the official website and Groupon. Through Groupon, you can apparently save up to 71%, although the original price seems to be $59.99 in this deal.

What Users Are Saying

“Awesome, definitely recommend! – Working great! I have lost 3 lbs the first week and they suppress my appetite. I only take 1x a day and they don’t make me jittery or keep me up at night. A++++.”

“I tried this product for 2 months because I previously took phentermine and it worked amazing! This product however did absolutely nothing ! It actually made me gain weight. It had terrible side effects which included stabbing chest pain and racing heart. I would not recommend this product to anyone.”

“No results! – Sadly, no pros. Cons? Product simply does not do a thing. I’m dedicated to working out five days a week and eating healthy. I am a coffee drinker so I’ve opted for a non-stimulant weight loss product. Sadly, I’ve yet to come across one that works. I honestly was just hoping for a good appetite suppressant, but this simply provided no benefits whatsoever.”

Bottom Line

The Bottom Line on PhenRx

PhenRx is a dietary supplement claiming to promote weight loss by suppressing appetite and burning fat. Based on research, there are some benefits to this supplement. Also, there are potential side effects of PhenRx ingredients. However, there are always alternatives.

Considering weight management involves so much, like exercise, smart food choices, and more, it can be difficult to make the necessary lifestyle choices for your individual needs. That’s where a clinically-proven program comes into place.

Among the best weight-loss apps we have ever seen is one called Noom. With personalized meal plans, human coaching, food logging, and more, Noom gives their users the chance to make healthier choices and lose weight.

For a limited time, Dietspotlight readers can get a free trial offer of Noom, so make sure to check it out before time runs out.

Learn More About Noom »
Phen Rx Review
Phen Rx Customers Also Bought:
Free Trial Offer
Explanation of Chart
Garcinia Cambogia
Caralluma Fimbriata

Phen Rx

What are the ingredients in Phen Rx?

This fat burning supplement contains Beta-Phenylethylamine, Hordenine, Schizandrol A, and caffeine.

What are the side effects of Phen Rx?

Possible side effects include headaches, vomiting, heart palpitations, and nervousness.

Does Phen Rx work?

Customers stated that this supplement helped to suppress their appetites.

What is the price of Phen Rx?

This product costs $39.99 for a bottle of 60 capsules.

Where can I buy Phen Rx?

This product is available for purchase at the manufacturer’s website, nexgenbiolabs.com.

Where can I buy Phen Rx?

Phen Rx can be purchased using their Official Site.

How should I take Phen Rx?

Take one pill thirty minutes before breakfast and dinner, every day.

How do I contact Phen Rx customer service?

Contact NexGen customer service at (813) 328-1662.

Can I return Phen Rx?

The company accepts returns for defective and ineffective products.

What are the most common complaints about Phen Rx?

The most common customer complaint is the side effects associated with the stimulants in the product.

7 Phen Rx Reviews

  • Patricia Kenney

    How do you use the patches

    • Montana (Editor)

      According to the official website, all you have to do is place the patches on an area on your body and wait 24 hours. Some of the suggested locations for patch placement include the upper thigh, near the belly button, and on the upper arm.

  • so far so good!

    I started this product a week ago. I have maybe lost a pound, but the amazing thing is, I put on a light jacket that I couldn’t zip before…and put it on yesterday, and it fits and zips! It doesn’t do everything for you, you have to be aware of the calories you’re taking in, but I’m staying with it at least for the month’s product that I have!

  • So far pretty good
    Cassandra (Verified Purchase)

    I have the PhenRX and PhenPM…I noticed a decrease in appetite right away. The PhenPM did not interfere with my sleep at all. Only on day 2 and my appetite is wayyyy down. Hope this continues. No side effects, no heart racing. The only thing I’ve noticed is that I have a little more energy during the day and that’s great. Heck that’s worth it..

    • Tracy Walker

      Have you lost any weight using PhenRx?! I just started it today!!

    • Charlotte Morris

      Me too. I started at 212 lbs and now at 179. Appetite way down.. I do a spinach,milk protein shake in the morning. One pill before lunch cravings kick in. Another before dinner the no carb meal of chicken or beef.veges if I feel like it. But I feel full. Works for me.

      • Aesha

        This great info. I see a difference in my cravings. No craving for Sugar, junk food, fast food or any other unhealthy foods. I enjoy drinking my herbal teas and fruit for breakfast. I have a large salad with either tuna or grilled chicken. I drink a veggie broth after 7pm or 8pm.