Phenastin is a non-prescription diet pill that you might come across if you are in search of a Phentermine alternative. While it is not truly an OTC alternative to phentermine, it does claim to be a “pharmaceutical grade weight loss stimulant.”

The product comes from Phenastin Clinical Weight Loss Solutions and supposedly provides benefits, such as reduced appetite and cravings, increased thermogenesis as well as improved energy levels and mood via its rapid acting and releasing caplets. When this Phenastin review was written, the product could be purchased on Amazon for $36.99.

Furthermore, at the writing of this review, each Phenastin white and blue speckled caplet contained 425 mg of the PHENASTIN 425 blend: Caffeine Anhydrous, Theobromine Anhydrous, Phenethylamine Hcl, 5-hydroxytryptophan (5-HTP), Mentha Piperita, Alpha Yohimbine.

Each of these ingredients can be found in many dietary supplements developed to support weight loss. Caffeine can boost mental alertness and is believed to also enhance energy and reduce appetite. Theobromine may increase metabolism and boost energy levels. 5-HTP is thought to help reduce appetite and is also believed to inhibit the intake of calories from carbohydrates. Alpha yohimbine is thought to help in the suppression of appetite.

All that said, only caffeine’s ability to boost mental alertness has ever been proven by clinical research. The rest of the claims made about these ingredients regarding their ability to help with weight loss are not scientifically proven fact. This means that taking this product will not necessarily lead to weight loss.

As for side effects, due to Phenastin containing stimulants, there is a risk of certain unpleasant effects, such as difficulty sleeping, sleeplessness, restlessness, jitters, anxiety, rapid heartbeat, headache, upset stomach, etc.

The suggested use is to take 1 caplet in the morning and 1 again with lunch. Users are cautioned not to take Phenastin late in the evening to avoid sleep disturbances as this product does contain caffeine. Additionally, users are instructed never to take more than 1 caplet at a time and not to exceed more than 2 caplets in a 24-hour period.

It should also be noted that this product has been developed to be used in combination with a healthy calorie-reduced diet and regular exercise, for optimal results.

While you may be interested in obtaining a stimulant diet pill, play it safe and make certain that Phenastin is the right choice for you. Consult with your healthcare provider before taking this product and/or making it a part of your weight management regimen.


PhenterMaxx is another OTC (over-the-counter ) weight loss supplement created as an alternative to prescription diet medications like Phentermine and Adipex-P. It is manufactured by Ultimate Weight Loss Labs and supposedly works to suppress appetite, super-charge your energy, burn fat without depleting muscle, and provides you with more control over your mood.

The main active ingredient in PhenterMaxx is phenylethylamine HCl. Phenylethylamine (also known as PEA), is a common weight loss ingredient and is often found in many OTC dietary supplements designed as Phentermine alternatives. It is a stimulant that is believed to help increase alertness, improve mood and concentration. It is also commonly believed that it helps to suppress appetite, however, there isn’t enough clinical evidence to back up this claim.

Furthermore, PEA is frequently used in combination with caffeine as it can enhance the effects of caffeine, which may lead to the burning of more fat when combined with physical activity. PhenterMaxx contains 150mg of caffeine anhydrous per serving (1 tablet). In addition to caffeine and PEA this product’s pharmaceutical grade formula also contains N-Methyl-B-Phenylethylamine, Yohimbine HCL, Theobromine Anhydrous and Synephrine.
Based on this ingredients list, it’s clear that the formula contains multiple stimulants, including synephrine, a naturally occurring stimulant in bitter orange (citrus aurantium), which not only enhances the effects of caffeine, but can also lead to more serious adverse effects, such as high blood pressure, heart attack and stroke.

That being said, while such dangerous effects may not be a serious threat for most individuals who follow the directions of this product, it should be noted that there is a risk of experiencing other unpleasant side effects associated with these stimulants, such as jitters, anxiety, insomnia, mood changes, upset stomach, headache, rapid heartbeat, and so on. To help reduce the risks of these effects, it would be wise to avoid taking any other stimulants (ex. drinking coffee, tea, energy drinks, soda, etc.) while using PhenterMaxx.

The recommended directions are to take 1 tablet after breakfast and 1 following lunch. You should not exceed 4 tablets within a 24 hour period. For optimal weight loss results, this product should be combined with a healthy and calorie-conscious diet and regular exercise. Taking PhenterMaxx without making additional conventional weight loss methods is unlikely to lead to any measurable fat loss success.

Presently (when this review was written) PhenterMaxx could be purchased on Amazon for $59.99. Be that as it may, speak to your healthcare provider prior to taking this product.


Phen-ES is a diet pill that has been created to improve mood and increase mental focus. It is marketed as a pharmaceutical grade fat burner of the highest quality. The front label of the bottle advertises that the product contains Phenylethylamine Hydrochloride, a stimulant that works in the body to make certain chemicals that help with athletic performance, depression, mood, and weight loss.

According to the Amazon product page for Phen-ES – at the time that this review was written – the ingredients in this formula help with appetite suppression, fat burning, boost daily energy and improve mood. The ingredients include: B-phenylethylamine HCL, Yohimbine HCL, Caffeine, Theobromine Anhydrous.

The key ingredient is B-phenylethylamine HCL, also known as PEA. This ingredient is from where Phen-ES takes its name. By using “Phen” in its name this also works in the product’s favor in terms of being considered an OTC alternative to the prescription diet drug Phentermine. As was previously stated, PEA stimulates the body to create certain chemicals that play a role in both psychiatric and depression conditions.

Unfortunately, although PEA has been studied to determine its effects on depression, mood, weight loss and focus, among other conditions, there is insufficient evidence to prove that it works on any of these conditions. Further scientific study is required to know exactly what effects – good or bad – this substance has on humans.

It should also be noted that this ingredient has been linked to many negative side effects due to the fact that it works in a similar way to the drug amphetamine and may cause similar unpleasant effects. These may include: agitation, anxiety, rapid heart rate and so on.

Furthermore, this product also contains caffeine, which is another potent stimulant that affects the nervous system. It can cause similar effects to PEA as well as insomnia, jitters, restlessness, upset stomach and more.

Be advised that due to the contents in the Phen-ES formula, this product may not be safe for individuals with psychological disorders. For instance, PEA may cause individuals with Bipolar disorder to become manic and may worsen the symptoms of hallucinations and delusions for those with schizophrenia. It should also be avoided by women who are pregnant or nursing. To be on the safe side, you should talk with your healthcare provider prior to taking this non-prescription diet pill to make sure it is safe for you.

At the time that this Phen-ES review was written, a single bottle containing 60 tablets cost $44.99 on Amazon.


Phenoral is a dietary supplement that is designed to suppress your appetite and boost energy. It is a non-prescription weight loss formula that provides increased alertness, energy and appetite suppression. At the time this review was written, the official product website explained that Phenoral is specially designed to provide you with the mental and physical strength you need to curb your appetite while, at the same time, preserving your positive and energetic mindset.

Phenoral is made up of a proprietary blend of ingredients. These include: Phenylethylamine, Theobromine Anhydrous, Methylsynephrine, Caffeine Anhydrous and Yohimbine Bark. The site claims that the product is “scientifically formulated to target problem areas.”

How do these ingredients work to help a person lose weight? According to research, phenylethylamine can cause neurotransmitters in the brain to trigger alertness and happiness. Studies suggest that theobromine anhydrous stimulates the heart to widen blood vessels for better blood flow. Methylsynephrine is an adrenaline booster and may help to suppress hunger, as well as boost energy to help burn more fat. Caffeine anhydrous stimulates the central nervous system to help improve alertness, enhance exercise performance and boost fat burning. Yohimbine bark may help to lower abdominal fat, reduce cortisol levels and control stress levels by increasing epinephrine.

None of these ingredients have been scientifically proven effective for aiding in fat loss. Even, caffeine, which has been proven to increase alertness and contribute to fat burning, does not guarantee weight reduction. Simply because fat burning occurs, this does not mean pounds will be lost.

In addition to their being no proof that Phenoral will help a person achieve measureable weight loss, another downside to this weight loss supplement is the fact that all of its active ingredients are stimulants. Due to this fact, the risk of adverse side effects is potentially high with this product.

Common side effects associated with stimulants, such as caffeine, include: rapid heartbeat, sleeplessness, agitation, headache, dizziness, anxiety, nausea, nervousness, restlessness, stomach irritation, ringing in the ears, etc. The risk of these side effects and even more serious ones, including high blood pressure, fainting, heart attack and stroke, are increased when caffeine is combined with synephrine. This is because synephrine, an ingredient also found in Phenoral, enhances the effects of caffeine (both good and bad).

The recommended dose is to take two tablets per day, but it might be best for users to first take 1 pill per day to assess their tolerance. That being said, it would be wise to first consult with your medical provider prior to taking Phenoral.

When this review was written, a one month supply of Phenoral sold for $19.99.