PhenRx is another non-prescription Phentermine-alternative brand that is known for its powerful weight loss formula.

Like its competitors Phen375, PhenObestin, Adiphene and many others, PhenRx claims that it can offer various areas of weight loss, that are seldom offered by other dietary supplement brands that can be found online.

If you are overweight or an obese individual, then you truly need a diet pill that will help support your overall weight loss program. So can PhenRx help you lose weight?

Read on to better understand how this diet pill works and learn if this brand can suit your slimming needs.

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What is PhenRx?

PhenRx is produced and distributed by a US-based health supplement manufacturer NexGen BioLabs Inc. This pharmaceutical company offers various type of products ranging from slimming and nootropics, to general health and beauty supplements. PhenRx is a sister product of the equally successful diet pill – SlenderFruit-7.

So what makes this diet pill different from other phentermine alternative brands? Nexgen BioLabs claims the following benefits from taking PhenRx compared to other brands.

  • It targets fat and lipid metabolism on stubborn problem areas
  • Increases your metabolic rate, fat burning and improved lean body mass
  • Powerful 24-hour appetite suppressing benefit
  • Boosts energy and mental focus

PhenRx is said to offer cutting-edge formula that will ultimately lead to quick and effective weight loss.

From its formula, it might help increase your metabolism that will result to more energy and fat burning effects. Plus, it claims that it can help trigger appetite reduction constantly that last up to 24 hours.

The official website claim that once your metabolism increases, PhenRx will then stimulate your thyroid that will turbo charge your body’s fat burning mechanisms that will primarily targets your fatty areas.

Ingredients of PhenRx

PhenRx is a pharmaceutical-grade dietary pill that most customers believe can cause significant slimming effects due to its simple but potent ingredients. Some of its agents include the following:

  • Trimethylxanthine
  • Beta-Phenylethylamine
  • Synephrine HCL
  • N-Dimethyl-4-hydroxyphenylethylamine
  • Schizandrol A
  • Yohimbe HCL

Inactive ingredients include magnesium stearate and silicon dioxide.

PhenRx ingredients

How does PhenRx Work?

Overeating or binge eating is probably the number one cause of weight gain and that is the purpose of phentermine products including PhenRx.

The fact is, most overweight and obese individuals have difficulty controlling their food cravings, which makes their weight loss endeavors fail. PhenRx works by reducing your cravings two folds compared to other hyped dietary pills in the market.

NexGen Biolabs claims that PhenRx is one of the most powerful appetite suppressant formula that can stop food cravings and makes dieting an easy task. If you can manage your diet more effectively, then it will help curb your cravings that will results to natural weight loss.

This supplement is also designed to help burn those stubborn fatty areas of your body such as skin cellulite, stomach, thighs and many others. The brand’s potent ingredients can help trigger fat loss on these fatty areas that will help reveal your sexy physique.

Plus, the manufacturer of this supplement claims that it won’t burn muscle tissues, making it a perfect supplement for your workout and other sports activities.

PhenRx Reviews

Gives me energy, curbs my appetitie and I’m losing weight! Been on it for 5 days and lost 5 pounds! Night time snacking is my crutch and with this pill, I have no move cravings! Love this product!

this product is great! it doesn’t have any side effects at all. ive been taking it for a week and I lost 7 pounds! it makes you lose a pound a day definitely! I was 130lbs before the Phenrx but now after a week I am 123lbs!

I’ve tried every pill out there on the market stating I’ll lose weight , non worked. I tried PhenRx and instantly it curbed my appetite, sometimes have to force myself to eat but I get full fast. I recommend this for those trying to lose weight, it really works. I’ve lost 8 pounds in a week without excercise.

I have been using this product for a week and have lost six pounds. Have lost my appitite from the first day of use. I get full fast with meals, have to force myself to eat snacks. Great product. I would recommend.

I bought this and tried the recommended dose on the bottle but had to cut it back to one a day. I take one each morning and it gives me energy throughout the day and I don’t feel hungry. I am really pleased with this product, and I don’t feel any side effects from it…Love It!
phenrx actual product

PhenRx actual product

PhenRx Health Issues

Since this brand is packed with caffeine, it is obvious that PhenRx is NOT a side effect-free diet pill. Though most customer testimonials showed efficacy for both appetite suppression and fat burning, this diet pill is still far from being a perfect one (no diet pill is perfect actually!).

Some of my readers reported some adverse health effects that include headache, jitters, insomnia and many others. These effects are actually common in most products that contains caffeine, and PhenRx is not an exemption.

If you are not allergic to caffeine, then you have less to worry about these reported side effects.

We know that NexGen BioLabs is a reputable company that manufactures quality dietary supplements. But since side effects are possible (or occurs), you are encouraged to consult your doctor first before you use it for your weight loss program.

Directions of Use

Like any other appetite suppressants, NexGen Biolabs recommend that you take 1 capsule before lunch and another capsule before dinner. You should not exceed this serving per day as it can interfere with your health due to stimulants.

Again, it is advisable to consult your physician first before taking any phentermine alternative products such as PhenRx, especially if you have existing health conditions such as hypertension, diabetes, pregnancy or if you are under the age of 19 years.

This is to ensure that your diet pill supplementation will not trigger any adverse health effects but only desirable weight loss.

PhenRx Review Summary

PhenRx offers a clean and simple formula that is likely to give you favorable slimming results. With its phentermine-like properties, it is highly possible that it can also trigger some measures of appetite suppressing and fat burning effects.

However, you also have to be cautious when taking this product as it is known to cause side effects.

Here are the reasons why this supplement is for you:

  • Natural formula
  • Some favorable reviews online
  • May help trigger significant weight loss
  • Money-back guarantee


Where to Buy PhenRx?

PhenRx is not yet available at any pharmaceutical retail stores near you. It can only be purchased directly from its NexGen BioLabs’ official website.


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Perly Rodolfo

This is Perly, and I am your diet pill investigator here. I love providing useful contents online and I am committed to give you the most accurate and unbiased slimming product reviews for your weight loss needs. If you have questions, you may reach me by sending a message to our contact page.  

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  • Christi August 7, 2014 at 10:49 pm - Reply

    Can I take phenRX while taking suboxone?

    • Perly Rodolfo August 8, 2014 at 2:28 am - Reply

      According to a Nexgen Labs associate, you can take Suboxone together with PhenRx.


      • Christi August 8, 2014 at 3:03 am - Reply


    • deronte forbes March 4, 2015 at 9:06 pm - Reply

      Warning do not try PhenRx. Gives you a tired feeling, makes your heart beat faster than normal. You will suffer from insomnia. Make you energetic for the first few hours then there is a crush where you are so tired your body aches, irritable. You will have a very watery stools which indicated dehydration.

      Please take my warning

      • Perly Rodolfo March 5, 2015 at 12:11 am - Reply

        Hi Deronte,

        Sorry to hear that. First off, did you took the pills as directed? Your experience with PhenRx was a testament that our bodies react differently from each other with regards to diet pill supplementation.

        As an added information when taking PhenRx or any other diet pills, please take note of the following:
        – diet pills are not ideal for extended periods of time. This means that you should only take the pills as directed so you will not experience tolerance or crushes.
        – you are encouraged to combine a healthy diet and regular exercise

        Exercise is a very important aspect of diet pill supplementation as it helps negate the possible side effects. I suggest you stop taking PhenRx and look for other supplements that you think will be able to help you lose weight with less adverse health effects.

        Hope this helps. I wish you all the best!


      • Selda June 8, 2016 at 10:27 pm - Reply

        Well we have all different reaction for bills if u have that experience is doesn’t mean everybody will too

  • melissa Cockrum August 19, 2014 at 1:51 pm - Reply

    So I have been taking these pills for over 2 week’s. They do not work. I quit soda, junkfood, started walking every day and changed what I ate and no results. I get more energy from a rockstar. It does curb my appetite some. But as far as the extreme weight loss etc…. for me didn’t work. I will not purchase these pills again.

    • Perly Rodolfo August 19, 2014 at 1:58 pm - Reply

      Hi Melissa,

      Sorry to hear that. Did you took the pill as directed? The primary feature of PhenRx is appetite suppression. Did it helped curbed your appetite?

      We all know that results do varies for dietary supplements. Maybe one of our top rated pills can help you lose weight.


    • Christi August 24, 2014 at 4:06 pm - Reply

      I have also been taking these pills! Have not lost any weight either!

      • Perly Rodolfo August 25, 2014 at 4:03 am - Reply

        Hi Christi,

        Sorry to hear that. I suggest that you consult your doctor before you take PhenRx with Suboxone. This is just to ensure that the effects of PhenRx will not be affected by this drug since Suboxone is a narcotic that can react with many other substances.

  • gloria August 22, 2014 at 7:34 pm - Reply

    Hi!! I have tried these pills for 2 months and I’ve lost 15lbs !!! I never thought it would help but like all pills you try them for a month no results you throw them away . Phen RX has been a big life saver , they don’t make me sleepy they stop me from eating late nights ,no jitters! I love the pill and will continue to buy!!!

  • yuri February 7, 2015 at 6:25 am - Reply

    I though that all those Amazon reviews were fake, but I did slim down with this diet pill. PhenRx is the real deal!

    • Perly Rodolfo February 7, 2015 at 1:54 pm - Reply

      Thanks Yuri!

  • Iggy February 11, 2015 at 3:18 am - Reply

    Thumbs up for this site! I have been using phenrx for about 2 1/2 months and I’ve lost about 1 stone. I haven’t been doing much physical workouts but have improvised my diet. I think Phenrx tablets are great and would totally recommend them to everyone looking to lose weight weight quick.

    • Perly Rodolfo February 11, 2015 at 5:52 am - Reply

      Thanks for sharing Iggy. Glad to know that PhenRx did helped you lose weight even with less exercise, which is a truly essential and informational for other dieters who are planning in trying PhenRx for their slimming program.

  • Cmara April 28, 2015 at 2:39 am - Reply

    Started taking PhenRx & having intense migraines. Just first day. Will this subside – all
    else is ok.

    • Perly Rodolfo April 28, 2015 at 2:44 am - Reply

      Sorry to hear that Cmara.

      Do you have history of migraine? If this is the first time you had migraine, then it might be a side effect of PhenRX. There are some people who complained side effects for this brand but most of the reviews are mainly positive. If you think that PhenRX caused your migraine, then I suggest that you stop taking it and see your doctor. Otherwise, it is best to pinpoint the real cause of your migraine. Only then you can continue taking diet pills.


  • debbie g May 6, 2015 at 2:11 am - Reply

    Ordered these and was very excited to receive them until I opened the bottle…..these pills stink so bad!! Smells like dead rotted fish!! Never got a chance to take them, couldn’t get past the smell!

  • christine May 23, 2015 at 2:09 pm - Reply

    Does it contain caffeine? Are there many complaints of headaches associated with product?

    • Perly Rodolfo May 24, 2015 at 5:08 am - Reply

      Hi Christine,

      Yes it contains caffeine (trimethylxanthine). This means that PhenRx is not ideal for people with high sensitivity to caffeine.

      There are some reports of side effects but majority of testimonials have shown that PhenRx was able to helped them lose weight.

      Talk to your doctor first if you are highly sensitive to caffeine.

  • dietpill_watch June 2, 2015 at 2:05 am - Reply

    I expect more side effects from this phenrx due to its caffeine. But I am impressed, got no side effects and it boost my energy three-folds! I was able to workout extensively with this pill and lost 12 pounds already. Truly amazing. But of course, its just me!

  • Trinity July 19, 2015 at 6:43 pm - Reply

    PhenRx has worked very well in suppressing my appetite, it gives me a little energy and the diuretic works VERY well also, I can’t take PhenRx when I have to work.

  • Sam October 27, 2015 at 10:07 pm - Reply

    Can I skip taking it before dinner? Since it contains caffeine, I’m worried I will have a hard time going to sleep.

    I also have the PM which I will take. I’m just skeptical to take PhenRx and PhenRx PM. Pls advise.

    • Perly Rodolfo October 28, 2015 at 6:20 am - Reply

      Yes, that is what PhenRx PM is designed for. Thanks

  • Andrea December 14, 2015 at 4:55 pm - Reply

    How many mg of caffeine does this pill have?
    And would i be able to take a pill apart just so i can just take half a dose??

  • Tia Curry January 28, 2016 at 3:50 am - Reply

    Felt dizzy at first, maybe due to caffeine. But these pills are amazing. I just have it for a week and I can feel that my appetite for food is decreasing.

    • Perly Rodolfo January 28, 2016 at 5:40 am - Reply

      That is good Tia! Keep us updated with your weight loss program! Thanks.

  • Lee March 11, 2016 at 5:28 pm - Reply

    Are these gluten free?

    • Perly Rodolfo March 12, 2016 at 3:59 am - Reply

      Please ask NexGen Biolabs directly.


  • Luz March 22, 2016 at 5:37 pm - Reply

    Ok first 2 days. Had to stop due to feeling dizzy, nauseous, an weak.

    • Perly Rodolfo March 23, 2016 at 3:01 am - Reply

      Thanks Luz for sharing your experience with PhenRx. 🙂

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