Updated: 11/24/2015 - Sponsored by Leptigen

Fastin-XR Review - Does This Weight-Control Supplement Work? Are side effects and ineffectiveness deal breakers?

Editor's Review: 3.5 / 5.0

fastin-xr-product-imageWe’re hearing a lot of buzz about Fastin-XR, so we dove deep into the ingredients, side effects, customer service and clinical research. We collected comments from hundreds of user reviews and statements. Then, we gathered, condensed and summarized to give you the info you need.

EDITOR'S TIP: Substitute Fastin-XR with a proven fat burner such as Leptigen for better results.

What You Need to Know

To start, Fastin-XR is a weight-loss supplement that contains caffeine, 1,3 dimethylamylamine, methylsynephrine and two forms of phenylethylamine. You take up to three capsules a day and that’s supposed to boost energy and help you lose weight. You’ll have no trouble taking this one with you, a good thing.

The product, introduced by Hi-Tech Pharmaceuticals after the company started in 1993, lists some of the ingredients online, a positive. We like that some customers report results and the BBB rating is an “A-“, but read on…

Side Effects – “A Major Issue?”

The first issue deals with Fastin-XR side effects. We found more than a few reports of dieters noticing significantly negative changes after taking the supplement. “There are a few ingredients in the formula with some clinical support,” explains our Research Editor. “But, the user has to take into consideration the parts that may cause problems as they take precedence over any positive.”

“I was very positive when purchasing this based on the reviews but when I took 1 tablet, my heart was racing. I thought it would jump out of m throat! I then tried 1/2 tablet and still the same result,” explains a dieter.

” I tried a whole tab and I thought my heart rate was way toooo fast,” says a user.

Yet another describes more issues, “It made my heart race and my blood pressure shoot up. You feel like if you don’t move you’re gonna go crazy. I was very moody after it took effect. It also dehydrates you like crazy.”

Scroll below for one of the best products we’ve seen in 2015.

FDA Action – “What’s That About?”

Hi-Tech Pharmaceuticals has been the subject of multiple FDA investigations. The latest letter was sent to the company in April 2015. According to the communication, several products, including Fastin-XR were mislabeled. They were told to stop selling all supplements claiming acacia rigidula was a source of Beta-methylphenethylamine. We checked the official website and it appears they have complied with the order.

Ineffectiveness – “Not Effective?”

Hi-Tech Pharmaceuticals claims Fastin-XR is the “strongest and most technologically advanced diet aid ever developed.” Those are some big shoes to fit and dieters aren’t convinced the company is telling the truth. “After giving the product a full month I found it pretty worthless,” offers one user.

“I am a trainer therefore I know what it takes to lose weight, I am not one of those people who expect a miracle pill, however i have not shed 1 pound!,” says a consumer.

A disappointed dieter explains, “I have been on this for 30 days and have been watching my intake. I haven’t lost a pound, in fact I gained a couple. I do not recommend this product, I am going to try something else.”

Based on our research, it takes one thing, like side effects, to ruin your chances of long-term success. If Fastin-XR causes jitters and shakes, among other reactions, the dieter may well stop taking it within a few days.

The Science – “Where’s the Proof?”

All you get from Hi-Tech Pharmaceuticals is a long description packed with product claims. We didn’t find a single reference to clinical studies. We were able to locate research supporting caffeine as a metabolism-booster, but it was the warnings that caught our attention. Both synephrine and 1,3 dimethylamylamine are associated with some pretty harsh side effects like increased heart rate and increased blood pressure. The fine print for Fastin-XR does say it can cause issues with BP and it may interact with medications.

The Bottom Line – Does Fastin-XR Work?

So, what’s the final word on this one? We were quite interested in taking a closer look at Fastin-XR. The supplement does offer a decent price and Hi-Tech Pharmaceuticals has been around for more than 20 years, but we have some reservations about supporting a product that potentially causes side effects with ingredients that are not clinically proven. We’re also concerned with the FDA’s interest in the company and the fact that they are currently involved in a lawsuit with the FTC.

If now is your time to lose weight, we suggest going with a supplement that gives you clinically proven ingredients that’s not in the cross hairs of any government agency. It is a huge benefit if there are no side effects, either.

Among the best products we’ve seen in 2015 is one called Leptigen. The formula consists of four ingredients in a proprietary blend supported by clinical research showing it helps boost fat loss and spark metabolism. We’ve not found a single dieter talking about adverse side effects, but we found plenty telling others about seeing great results.

Also, the company that makes Leptigen is confident in the product so they’re offering a Special Trial Offer, a rarity.

Learn More About Leptigen »
GD Star Rating

How Does Fastin-XR Compare?

Previous Fastin-XR Review (Updated September 23, 2014):

What You Should Know

Click Here To See Our Highest Rated Review

You may turn to one of the various online supplement stores for a weight loss product. It is no secret that dozens of these diet pills and weight management supplements are available online. Some even contain proven fat loss ingredients. Among these diet pills, you will find Fastin-XR, which is brought to you by Hi-Tech Pharmaceuticals. It is available for around $80 per bottle, and does not require a trip to the doctor for a prescription. But, does this weight loss formula yield real results? We will go over the specifics in this review. Ingredients:
  • Caffeine Anhydrous 150mg
  • Theobromine
  • Yohimbine HCL
  • DMAA
  • Green Tea Extract
  • Naringin
  • Synephrine
  • 5-methoxytrytamine HCL
  • Acacia Rigidula Extract
  • R-beta-methylphenylethylamine

Product Features

Fastin-XR can be taken daily in order to aid with weight loss. This supplement contains a number of key ingredients to potentially improve the metabolism, elevate mood, burn off fat, provide antioxidant protection, suppress appetite, and boost thermo genesis. There is no low-fat diet required with Fastin-XR, and this formula is okay for women and men, 18 and older. However, there does not appear to be a refund guarantee offered. In regards to eth ingredients found in Fastin-XR capsules, they include Caffeine Anhydrous (this is a stimulant and diuretic that may improve energy), Green Tea Extract (contains caffeine and antioxidants to boost the metabolism), Theobromine (this is a stimulant and mood enhancer that may help eliminate excess water weight), Yohimbine HCL (a stimulant that helps improve metabolic rates for fat burning), Naringin (grapefruit extract that suppresses hunger), Synephrine (an alternative to Ephedra that increases thermo genesis), Acacia Rigidula Extract (boosts energy levels and curbs hunger), and R-beta-methylphenylethylamine (suppresses appetite).

See Our Featured


  • The ingredients used in this weight loss formula are revealed online.
  • Fastin-XR requires no prescription.
  • This diet product contains antioxidants to fight free radical damage.


  • This diet pill contains Synephrine, which acts like Ephedra.
  • There are four different sources of caffeine used in Fastin-XR.
  • The stimulants in this weight loss pill might lead to side effects.
  • There is no guarantee available with this dietary supplement.


There are plenty of diet pills and weight loss products that are loaded down with stimulants. Fastin-XR is no exception. After all, this supplement contains four types of stimulants, in addition to Synephrine. Synephrine is basically an alternative to Ephedra, and it causes similar effects. Therefore it may also lead to similar side effects, which can be dangerous. Therefore we do not recommend Fastin-XR for safe weight loss. Not to mention the high price of this diet pill. $80 is a lot to spend on a dietary supplement; especially when there are so many others available for much less money.

Fastin-XR FAQ:

We boiled down countless dieter reviews and user comments about Fastin XR into this helpful FAQ.

What are the side effects of Fastin XR?

Possible Fastin XR side effects include; headache, increased body heat, jitteriness, anxiety, elevated heartbeat, depression, vomiting, stomachache and abdominal discomfort.

What are the ingredients in Fastin XR?

The ingredients in Fastin XR are; Acacia Rigidula Leaves, Caffeine Anhydrous (150mg), Yohimbine HCL, 5-Methoxytryptophan HCL, Naringin, 1,3-Dimethylamylamine, Green Tea Leaves, Synephrine HCL, Theobromine, Phenylethylamine, R.Beta-Methylphenylethylamine, Methylsynephrine, N-Methyl-B-Phenylethylamine, Hydroxypropyl Methylcellulose, Dicalcium Phosphate, Sodium Starch Glycolate, Magnesium Stearate, Silica, FD&C Blue #1, FD&C Red #40 and FD&C Yellow #6.

Does Fastin XR work?

Some studies have shown that the stimulants in Fastin XR, which include Caffeine Anhydrous, Green Tea, Synephrine HCL and 1,3-Dimethylamylamine, can help boost metabolism and increase energy levels. However, aside from Caffeine Anhydrous, the amount of these other stimulants used in Fastin XR is not disclosed. This makes it difficult to determine how effective this product actually is for weight loss.

You might want to think about substituting Fastin XR with a product that is supported by published clinical research such as Leptigen.

How much does Fastin XR cost?

The cost of Fastin XR is $79.95 (90 capsules).

What is Hi-Tech Pharmaceuticals’ BBB rating?

Hi-Tech Pharmaceuticals is not BBB accredited.

How should I take Fastin XR?

You should take 1-2 capsules of Fastin XR each morning and one capsule after lunch. It’s important not to exceed four capsules per day. A single bottle will last for 30 days.

How do I contact customer service?

You can contact Hi-Tech Pharmaceuticals, the company that makes Fastin XR, by calling 1-888-855-7919. Their customer service email address is customerservice@hitechpharma.com.

Can I take Fastin XR if I have a health condition?

Individuals under the age of 18, women who are pregnant or nursing a child, those taking prescription drugs or people with pre-existing health conditions should consult a doctor before taking Fastin XR.

What do users like about Fastin XR?

Some customers appreciate that Fastin XR is easy to take anywhere and it’s readily available online.

What do users NOT like about Fastin XR?

Some users do not like that Fastin XR can lead to unpleasant side effects and there is no mention of a 100% satisfaction guarantee on the company website. Also, some customers do not like that there is an FDA warning posted online regarding this product.

Does Fastin XR elevate blood pressure?

Some customers have stated that Fastin XR increased their blood pressure.

How long can I take Fastin XR?

You can take Fastin XR until you have reached your desired weight.

Do you know of any special deals or discounts on Fastin XR?

No, we’re not aware of any special deals on Fastin XR at the moment. However, the last few months many of our readers have been going crazy about Leptigen’s special trial offer, which is just the cost of shipping and handling. Click here to give it a shot.

7 User Reviews About Fastin-XR

Leave comments below
  • 1
    Samantha Gaona

    I took 1 tab, in the morning before work, about 15 minutes after my heart my racing. I work in a doctors office so i took my blood pressure, it was 160/92 and pulse 103. It was pretty high. I took it again at 1pm, it went down to 142/81 pulse 80. Still high. I can not focus much. it hard to sit and stare at a computer. When speaking with patients my mouth is not speaking as fast as my head. Ha anyway. They do keep me from feeling hungry. But I just dont like the affect if gives me.


  • 2
    Donna Oyadomari

    Unfortunately this product caused me to have an allergic reaction. Please let me know how to return the unused product. I apologize for this, however, I am unable to take anymore.


  • 3

    I have tried both the 45 count and the 90 count of fastin-Xr and the 45 count seemed to work ALOT BETTER then the 90 count. I was not hungry and got full quickly. Taking 1 pill at a time instead of 2 in the morning and 1 in the afternoon worked better for me, good inc in energy without the jitters when taken that way. I bought the 90 count when I couldn’t find the 45 count anywhere and didn’t feel anything at all with them.


  • 4

    I have been taking these pills for 3days now and not only did I get my first compliment today but I also have not been hungry since I started taking them!!!! These pills are awesome and I will definitely recommend them



    I bought these pills awhile back but never gave them a try. Now that I’ve gained a whoops load of weight an extra 20 lbs!! I’ve tried clothes on and nothing fits. I’ve decided to open bottle and pray that a genie comes with them and help me to help myself. I’m so depressed. It feels like everyone looks at my big butt!! Lord knows how uncomfy I am with myself.So if you have got benefits with this product please let me know what kind of food helped out.If you have any advice my ears are open. Please share. Your new friend. Ms.Cheryl


    Michael Palmer

    Cheryl, how are you? I know this reply has taken near a year for you to receive it, but I just want to say…Don’t Give UP! I certainly know how you feel about putting on weight. Weight gain has been my nemesis for years. Im trying these Fastin pills in hopes to curb my appetite. (Folks say they work) Since I’ve increased my cardio, Im always Hungry. I swear, there’s always something!!! Lol! but seriously, I’m not giving up and I hope you don’t either! Good Luck and stay focused!
    Mike P.


    Samantha Gaona

    It higher your bp, and pulse. Be careful within 20 minutes of taking 1 pill my heart was racing. my bp and pulse was. 160/92 and pulse 103.

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