A product that has been around for a couple of years now, Phentabz is a relatively high profile diet pill. It comes with some aggressive claims, and is touted as being the answer to all your weight loss needs. In fact they claim it’s “The worlds #1 Appetite suppressant and weight loss pill.”

Let’s have a look at Phentabz and the company behind it and see what all the fuss is about. Will it live up to the hype?

Phentabz Pros

  • Potentially contains effective ingredients

Phentabz Cons

  • (Very) Confusing sales page
  • No address provided
  • No guarantees
  • No clinical studies
Watchdog Rejected Diet Pills

Phentabz Review

Phentabz Facts

  • Based in Florida, USA
  • Sells through website, doctors and shopping malls
  • Lacks ingredient profile

Ok, straight away let’s have a look at the website for Phentabz and see what we can find.

At first glance, it’s a pretty poorly designed webpage in our opinion. For a company claiming to have the world’s best product we expected something a little better, but they may have gone for the cheap and ugly look deliberately. As we have seen many times before, a beautiful looking website does not mean the product is good at all.

We are hoping there might be a real gem hiding behind the front page, so let’s press on.

The overriding feeling from the home page is that they are trying to tout this as a real drug. There’s a ton of mixed messages and at the end of it, we were still not sure what Phentabz actually is.

They have some lovely sounding claims like “a true pharmacological diet pill’”, “pharmaceutical analog” and “Phentabz works like a prescription drug, but without a prescription.”

We think they are trying to create the impression it’s a proper “drug”, with FDA approval and all that goes with it …. but then again maybe not. See what we mean, confusing as hell.

We were no wiser after wading through the claims, deliberately confusing? Possibly.

Phentabz Warnings:

  • No address for the company clearly shown
  • No ingredient profile
  • No scientific evidence
  • Long list of potential side effects

What Does Phentabz Claim To Do?

As already mentioned, Phentabz claims to be the “The world’s #1”
Unfortunately this is a meaningless claim, as there are no terms of reference for this.

#1 for what? And measured on what scale? It could even be the #1 for failing to be effective for all we know, this is how ridiculous this claim is.

The big play they seem to be making is that Phentabz is available without prescription, they do this by comparing it with a “stronger” formula of theirs called Phentabz RX. This is supposedly only available from Doctors by prescription, however we could find no evidence at all that Phentabz RX is a FDA approved medicine.

We would hazard a guess that Phentabz RX is sold to Doctors only and they then sell these on to patients for a profit. This would be without a prescription, as it’s not a prescription only drug as far as we can tell.

This way they can claim that Phentabz RX is only available from Doctors. The “RX” usually signifies a prescription only medicine but there are obviously some very strict rules regarding this from the FDA.

We had a look on the FDA database but couldn’t find anything, either for Phentabz or for Phentabz RX;

Phentabz FDA search


On the site itself they have a couple of Doctors claiming to back Phentabz, but we found this quote from Mary Hoke ARNP, who runs a medical weight loss center;

We offer a non-prescription pharmaceutical that is only available through physicians.

But then in the website FAQ’s they say this:

Our original formula, Phentabz RX is still available by prescription only.

If you weren’t confused before then you will be now!

So is Phentabz RX a real drug that is only available under prescription, or is it something with “RX” on the label that is non-prescription and is sold through doctors?

If it really is prescription only then it surely needs FDA approval doesn’t it?

We’ve been doing this job for a while now, and have seen pretty much everything, but even we were confused when reading this website!

So What Is Phentabz and What Are The Ingredients For Phentabz?

There is no simple way of finding out what is contained in Phentabz. All that is mentioned on the sales page is that:

The formulation consists of FDA Approved ingredients proven safe and effective when taken as directed.

Ok great, they won’t even say what is in the product! This is one of our pet hates, how on earth can you make an informed decision when they won’t easily show you what the product ingredients are?

After a bit more digging around elsewhere on the Internet, we finally managed to find some details of what’s in Phentabz. We don’t think that anyone thinking of buying this product should have to do this, but for the benefit of anyone interested, this is what we found.

  • Octopamine – This supposedly provides long lasting energy and is found naturally in plants. One of these plants is bitter orange and is commonly used in a whole host of diet pills. This is because there are claims that it helps mobilize the release of fat from fat cells. What is usually missed out, is that this released fat is promptly taken up in to other cells! There is a distinct lack of verifiable research into Octopamine as a weight loss aid.
  • Methylhexaneamine – This was originally developed as a nasal decongestant back in 1944, but then fell out of favour for a while. It was resurrected as a dietary supplement in 2006 after Ephedrine was banned. It is derived from geranium oils and is said to be effective as a stimulant.
  • 1, 3, 7 Trimethylxanthine – This is a pharmaceutical grade of caffeine and is said to work in conjunction with the other ingredients to provide a fat burning effect.

So What Does All This Mean?

The most shocking thing is that they have failed to indicate what proportions of ingredients you would actually be buying. There is no indication what amounts are recommended to take anywhere on the website. This could be a deliberate ploy, as with other pills of this type they normally don’t include enough of the ingredients that have been shown to have any effect on weight loss.

By not listing the exact amounts of Phentabz, it is simply not possible to determine whether anything that they claim is even achievable.

Ask yourself why they fail to list the exact composition of Phentabz Diet Pills!

Does Phentabz Have Any Side Effects?

No studies have been done either into the effectiveness of Phentabz or indeed if there are any side effects from ingesting the mix that they have come up with. There could possibly be long-term damage to the body; at this stage it is impossible to say one way or the other.

Phentabz contains caffeine and other stimulants so anyone who is susceptible to the side effects of caffeine should be careful. The website actually provides a long list of people who should avoid it, including those with high blood pressure, heart disease, diabetes or anyone with cardiovascular disease.

Any Phentabz Reviews From Customers?

There are a number of testimonials presented throughout the site but we have no way of telling how realistic these are.

So Does Phentabz Work?

Phentabz potentially contains some strong ingredients, but with no indication of how much of each ingredient then it is not possible to make an informed decision into whether or not it works. As they are using a “proprietary blend” then this stops us investigating any further. It would not be advisable to consume something if you have no idea what is in it.

Where Can I Buy Phentabz?

Phentabz is available online from the official site as well as a number of affiliates. They also supply Doctors; however it looks like the Doctors are simply buying these for resale. You do not need a prescription to buy Phentabz but they have given the impression that it is still a “drug.” It is also available to buy from selected shopping malls.

The website does not give the address of the company supplying Phentabz so it may prove to be difficult to contact them in the future.

What About a Guarantee?

Sorry, you are going to be disappointed if you are looking for a guarantee behind this product. There is no indication anywhere on the site as to whether or not you could get your money back if the product was not right for you. You may potentially suffer some side effects, but would then be unable to get a refund. Not good practice in our opinion.

Watch Dog Verdict


A massively confusing site with several mixed messages; no address details and a lack of a guarantee add up to rejection based on our criteria.

This could possibly be an effective weight loss diet pill but the negatives far outweigh the potential benefits in our opinion.

We suggest that the company undertakes a big overhaul of their site, before we could approve them. If they do that, offer clear address details, a proper guarantee and a clear ingredient profile then potentially we could look at them again.

Frequently Asked Questions

Does Phentabz actually work?

The ingredient formula in Phentabz claims to increase the mobilisation of fats at the same time increasing metabolic rate. Although the manufacturers claim;

bottom line is that PhenTabz provides consistent significant weight loss and increased energy.

No clinical trials appear to have been conducted on Phentabz and no clinical studies have been cited to support the bold claims made by this product.

Phentabz are compared against a weight loss drug only available legally via prescription, suggesting many of the plus points of the prescription drug are seen in this supplement. And importantly for many, claiming that Phentabz can cause an average weight loss of 2.5lbs per week – again there is little evidence to support these claims!

How do I Take Phentabz

You are directed to take Phentabz on an empty stomach 30 minutes before breakfast and again 30 minutes before lunch with 8 oz. of water. Only take a maximum of 2 tablets per day.

Are there any Phentabz side effects?

Although the official website FAQs suggest that “increased energy and rapid weight loss” are the main effects there are a couple of side effects to be wary of. Consumers could suffer from dry mouth or sleeplessness and if so should increase water intake.

As with any side effects if the symptoms persist you should stop taking the supplement and seek medical advice.

Warning: Recently the Therapeutic Goods Association (TGA) in Australia has issued a safety advisory notice stating that Phentabz has an undeclared substance that is banned, namely: 1,3-dimethylamylamine (aka DMAA).
You can read the full report here.

Are there any genuine Phentabz customer reviews

There are a couple of customer reviews on the official website and include video reviews which is great news. Looking at the results in youtube for Phentabz customer reviews show many more. It does seem that some of the youtube reviews include affiliate links that re-direct the visitor to a Gentech Pharmaceutical store selling the products. This mean whoever uploaded the review could well receive financial compensation.

Are there any Phentabz refunds or money-back guarantees?

There appears to be no money back guarantee or refunds on offer. Once you place an order then there is no way to get your money back.

Who is the Company Behind Phentabz?

The manufacturers are Gentech Pharmaceuticals who formulate the products when developed in concept by sister company, Gentech Laboratories. According to the Gentech Pharmaceuticals website:

Gentech Laboratories is regarded as the “Apple Computer” of the pharmaceutical world.

A fairly bold claim and one we believe is a little fanciful considering the pedigree of pharmaceuticals today.

Can I Buy Phentabz from Amazon or eBay?

A few of the supplements made by Gentech Pharmaceutical are available on with prices retailing for the same as seen on the official website.

eBay has a couple of Phentabz listings from 3rd party sellers who don’t appear to be linked to Gentech Pharmaceuticals. Again prices are the same as those on the official site.

Caution: As with any dietary supplements sold on eBay via 3rd parties, ensure you do your due diligence to check you are getting the real product and fake supplements containing inferior ingredients.

Where can I Buy Phentabz?

The most obvious place would be the official website, which offers a number of order packages from one to 4 bottles. As with most supplements the more you buy the cheaper per bottle cost.

One bottle of 60 tablets costs $69 with additional shipping charges. Only the 4 bottle option provides free shipping.

If you are ordering outside of the US then you will need to watch out for shipping charges.

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Disclaimer: Our reviews and investigations are based on extensive research from the information publicly available to us and consumers at the time of first publishing the post. Information is based on our personal opinion and whilst we endeavour to ensure information is up-to-date, manufacturers do from time to time change their products and future research may disagree with our findings. If you feel any of the information is inaccurate, please contact us and we will review the information provided.

Have Your Say

27 comments on 'PhenTabz'

  1. I love Phentabz! Stop with the cons! These work and help keep me skinny since the FDA pulled the original Lipo6 that contain geranium oils which is the absolute secret to weight loss. Phentabz has geranium oils!

  2. I found these did make me lose weight by suppressing my appetite… but they increased my blood pressure, I could feel my heart beating significantly harder, I’d get stomach cramps which made me need to visit the loo immediately. The worse thing was which was the deal-breaker was the crazy heartburn/acid reflux pains.
    I found I was eating to soothe the heartburn pain which defeated the object. I found I suffered this similar heartburn pains with bitter orange products like Thermabol.

  3. I have ordered these twice now and only because I definitely noticed a positive effect, but only if coupled with a decent diet. Above all, it gave me a new lease of energy. What I will say is Lexium International, who I initially purchased of, provided poor customer service. I now purchase of WellBeing Pharmaceuticals who I find to be far more professional in their service.

    1. I live in Verona, Italy, and I find difficult to buy safe weight loss pill in Europe. I order from WellBeing Pharmaceuticals, they ship everywhere and they deliver to me in less than week. Very good company and very good product, help me alot.

  4. I have been taking phentabz for 2 days now (twice a day) I am also doing a very controlled diet and exercise. So far I have not had any issues. It’s giving me enough energy to do a 20 min workout a day (which is not something I would normally do as to lazy)
    I am desperate to lose 2 stone and keep it off. I will update I a weeks time

  5. This is the worst product I have ever used, I took a tablet and then my started beating really fast literally thought I was going to pass out and basically have a heart attack that’s how bad I felt, I started shaking and my hands were uncontrollable, I couldn’t concrete in work as my mind was all over the place, basically felt like I had took a drug, never have I ever felt like this in my life.. so it DOES have side effects even though it’s stated they don’t have side effects! DO NOT RECOMMEND.

  6. Yes not for everyone but for healthy people who are overweight – it is very effective. My sister lost all the weight she wanted with just one pill at breakfast.
    I find that I will overeat and overeat if I don’t take a Phentabz RX. But even if I remember mid-meal and take one, I will stop overeating.
    Otherwise I will continue to eat even after my stomach hurts from eating too much and too many different foods.
    I love it for my narcolepsy as well.

  7. I’m torn with this product, I first encountered it last year, I used it for 2 months and lost 40 pounds. I continued to lose weight after I stopped taking the pill until my weight loss hit around 80 pounds. I decided to give them another shot, seeing as the first time they worked great; I’m not sure if it’s where I’m considerably smaller, or if the formula has changed. Now, I get these hot sweaty episodes with a heavy weight feeling on my chest, and it gets hard to breathe. I’m currently recovering from a cold, so I’m not sure if that’s the cause, or if it’s both the pill and cold, or just the pill? I don’t know whether to keep taking them, or to stop. I just spent a lot of money on these dang things, I don’t know, I just don’t know what to do. I have lost weight the past couple days that I’ve been taking them, but is it really worth compromising your health? I’ve researched, and there are mixed signals and reactions; the first day I took them (this time around) I felt fine, it gave me energy and I had no (chest heaviness) pain, but after that first day, I’ve had these strange episodes. If there are any doctors reading this, please tell me if it’s something I should reconsider! I’m almost certain those side effects are not normal, I’m going to give it another day or two, and if nothing changes, I’m going to stop the regimen.

  8. Started taking phentabz about a month ago. First I ordered them and it took me almost a month to get them, looked on the website for contact info And the only way you can reach anyone is through email, they told me that my ordered had shipped but had no shipping information to give me, finally after 3 1/2 weeks I told them I wanted my money back and they finally gave me the shipping info and my order was there a day later…(fishy) when they charged my credit card the day I ordered! They are HORRIBLE! I wish I would have found this site before purchasing them. They do not curb appetite rather make you more hungry and chest pains are aweful. No weight loss with these pills not one pound. TERRIBLE TERRIBLE TERRIBLE!

  9. Alexandra
    i’m sorry to hear about your daughter but it sounds to me as if she had bought a dodgey batch as do not contain Speed.
    start mine tomorrow cant wait

    1. Two weeks after my daughter was in hospital her friend died from taking diet pills, she was 26. Please for your own sake and your family dont take these pills x

    2. It depends on the health of your heart and if you take too many. Phentermine is a stimulant which speeds of your heart rate and metabolism. They’re not for everyone.

  10. My daughter is at the moment in the heart care unit being constantly monitored because of these pills. If she had taken any more of them she would have died. The consultant told her they contain speed, the legal type apparantky but I wonder. Please dont buy them

  11. I had mixed experience with Phentabz. I used less than two bottles overall with a break of about 1,5 years in between. The first time I used it it really curbed my appetite and the only side effect was that it was making me jittery, so I reduced the recommended dose by half, which worked. I found the ingredients online and I need to admit I was a bit concerned about their potential hidden effect on my organism but overall I was feeling well. I need to say I did not loose weight on this product and it’s not why I bought it. It helped me to control a potential stress eating and hence maintain my weight in times of high pressure. The second time I used it it did nothing other than making me feel like I consumed too much caffeine… as if they changed the mix of ingredients.
    I was considering giving it another try and I noticed that the company name changed; it’s Lexium International rather than Gentech. Does anyone know what happened? Is this the same product?

    1. ive been on them for just over a week not had any problems, I’m taking them as an alternative to amphetamine to give me the energy to get through the day , seem to work & they’re legal

  12. I have been taking PhenTabz RX and have had increased energy and moderate weight loss. I only take one tablet early in the morning because I can’t sleep at night when I take two. My question is; has anyone developed kidney stones while taking PhenTabz ?

  13. I have taken this for several days and it has not decreased my appetite so far. I have not experienced weight loss yet but there are side effects like feeling edgy and jittery and going to sleep at night has been difficult.

  14. i work in the medical field, first day using this product, I will be reporting my experience every two weeks, aparentely this work well with MIC/nutraceutics or aminoacids

  15. I am back 4 months later to report that I met my goal loss of 15 lbs after 5 weeks of using Phentabz. I’ve kept it off, and I am really pleased with the results. Phentabz marketing could do with a little makeover… That much agreed! But I’m in my size 2 leather Prada dress and that’s all that matters! Seriously I am in my 40s and have had a lifelong struggle with the last 10-15 lbs. I am delighted but also annoyed I didn’t discover Phentabz earlier. If your serious about losing some weight check it out. There is a really compelling testimonial on YouTube from an older Hispanic lady who cured herself of DBII by going on Phentabz. That’s a real story.

  16. I’m using Phentabz for two months and I loss 25 pounds. I try a lot of things, natural products, herbalife diet and nothing seens to work for me. This week I will start with exercise three days a week so I can get to my target weight is two months. Good product. Thanks

  17. Phentabz are awesome. You can lose 5 lbs a week healthily. They are very effective and get better results than i had ever dreamed of. The website isn’t great, but the appetite suppression is, and thats what counts. I recommend them to anyone. If you went through the full process of ordering them and using them, you would get a more complete picture… So whoever writes this watchdog report has made a judgement just on the website. Ingredients state proprietary formulation of Octopamine, Methyl Synephrine HCL, 7 Methyltheophylline.

    1. I bought me some but idk when I’m supposed to take them I saw to take one before breakfast. Can you help??

  18. Starting using Phentabz today…i’m not new to diet pills..and yes it’s working.
    Very pleased with results.

  19. I was a little skeptical at first, but i went ahead and bought it you have to make sure its from gentech and any site selling it should lead you to the gentech page to purchase it if it doesnt then your getting ripped off. I honestly love this product im more motivated and i hit the gym every 5 days out of my week and i do make better eating choices cause it helps me fight the urge to eat junk food, i feel sorry for this review cause i dont even think this person even tried the product and really gave you guys an honest opinion, i think it works n i got a 4 pack for my sister for christmas and she is looking good and feeling more motivated but of course its not for everyone my sister only takes one pill a day instead of two but they recommend you take two to see fast results, but anyway i just wanted to say this works for me and im still taking them i’ll be hitting my target weight by march and i really recommend this product

  20. I have bought 2 bottles of Phentabz and I must admit they really did work for me with regards to losing weight! I had so much energy, so excersising wasn’t such a chore and wasn’t hungry really at all. However!!!! I felt relly edgy a lot of the time, became very aware of my heart, didn’t sleep much all of this has made me weary of getting them again (though I would like to as they really work!)

  21. I bought Phen Tabz thinking they might be like Phentermine and Phentramine( non prescription). But they did not suppress my appetite and caused me severe chest pains and pain in my left shoulder blade running down my left arm and hand. I tried them for two days but the pain was intense and I thought I was having a heart attack.

    I called the manufacture Gentech and the customer service rep said unfortunately they can not take back an opened bottle. I will check with the place I bought them which was LA Fitness in Ft. Myers Fl. But I’m sure I’ll hear the same story.

    I will make sure my friends don’t loose their money to this product.

    Thank you for your insight to this product, I wished I had read your review before purchasing PhenTabz.

    Thank you

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