Arguably the most common prescribed weight loss medication is Phentermine. It is not available to buy over the counter without a valid prescription.

A whole new industry was created because of this – herbal Phentermine (or Phentermine alternatives). These products are naturally formulated appetite suppressants that mimic the effect and produce a weight loss benefit without the restrictions.

Quick Look: Top 3 Brands

  1. PhenQ
  2. Phen375
  3. Phentaslim

Best Phentermine Alternatives Online

Here are the best three herbal Phentermine brands to help you reach your weight loss goals. All three can be ordered online directly from the manufacturer and have a 60 day money back guarantee.



Is PhenQ the best of the best? We have been unable to find any products that can outperform it, and it wasn’t for the want of looking, so we have to say that it is. The manufacturer, Wolfson Berg, doesn’t go overboard with outlandish claims about what PhenQ can do.

They simply provide a list of the offered benefits and point out the fact that such a level of dietary support would normally require the use of several supplements.

PhenQ helps dieters to realize their weight loss dreams by offering five levels of support:

  • Appetite suppression
  • Fat blocking
  • Fat Burning
  • Extra energy
  • Improved mood

The weight loss process can be as hard on the mind as it is on the body and many dieters throw in the towel when their quest for a better, healthier body results in feelings of fatigue and grumpiness.

These two stumbling blocks often result from a decrease in calories and the loss of favourite foods, so by addressing these issues Wolfson Berg have created a product that can help dieters keep with the program and get the weight loss they desire.

Numerous customer reviews rave about how well the product works and its makers back PhenQ with a 60-day money back guarantee.




A natural weight loss pill designed to burn fat and suppress appetite. A real alternative to Phentermine.

It has great reviews from critics and customers. A mix of natural and pharmacy quality ingredients.

It’s hard to pinpoint a negative as such considering it’s position in the market. Phen375 is one of the market leaders as far as buying Phentermine online is concerned.

  • Maximum appetite suppression
  • Supercharges metabolism
  • Increased energy
  • Pharmacy quality

Phen375 was one of the first diet pills of its kind and arrived on the market over a decade ago. It is testament to the quality that it is a mainstay of many “top diet pill” lists or “buy Phentermine online” type articles that you may find on the internet.

There is a 60 day money back guarantee in place.




Phentaslim is a powerful diet pill manufactured by Optimum Nutra. It’s been on the market for a while and numerous dieters have shared their Phentaslim-powered dieting success stories on health and fitness forums and via their personal blogs.

The main benefits Phentaslim users can expect to achieve are:

  • Appetite suppression
  • Boosted energy levels
  • Reduced body fat
  • Improved mental function

Like the majority of diet pill options, Phentaslim works by helping to instil a situation where the body is using more calories than the diet provides. This causes the body to start burning body fat to get extra energy. 

Many customers report significant weight loss achievements by the time they have finished the first bottle, and Optimum Nutra provides a 30-day money back guarantee.


What is Phentermine

Phentermine (phenyl-tertiary-butylamine), is a generic drug doctors sometimes prescribe to patients who are severely overweight or obese.

Phentermine was approved by the FDA in 1959. Far from being a new drug, it’s been around for a long time. Despite the fact that other drugs also have FDA approval as weight loss medications for use in the USA, Phentermine continues to be the most popular option. According to IMS Health, it still accounts for 74 percent of the prescription weight management drugs sold in the USA. [source]

The popularity of the drug is partly due to its reputation for delivering results. Cost is another factor. It’s not as expensive as a lot of alternative weight loss drugs are. Phentermine costs around $30 for a 30-day supply. Some of the alternatives cost hundreds of dollars per month and are not always covered by medical insurance. 

Unfortunately, some people find Phentermine attractive for the wrong reasons. On a chemical level, it’s very similar to amphetamine (speed), which is often used as a recreational drug. It’s also equally addictive

The threat of misuse and/or addiction is just one of the reasons the distribution of Phentermine is kept under such strict control. It’s also the reason why doctors are only allowed to prescribe the drug for a maximum of 12 weeks.

Most people who use Phentermine can expect to achieve a weight loss of five to ten percent of their original body weight. 

However, despite the drug’s reputation, it’s important not to consider it a miracle weight loss aid. As with any other diet pill, you have to use Phentermine alongside a low-calorie diet. 

What Does Phentermine Do?

Phentermine is an appetite suppressant. Drugs that control hunger in this way are also known as anorectics.

Appetite suppressants are a valuable weight loss tool. Nobody likes to feel hungry. The sensation is as distracting as it is unpleasant. A lot of people give in to their hunger. That’s one of the biggest reasons so many diets fail.

Doctors in the USA are only permitted to prescribe Phentermine to people who have a BMI of 27+. This needs to be accompanied by at least one weight-related medical condition, such as high cholesterol or hypertension.

When your BMI is 27 or higher, you are extremely overweight. By the time you have become so overweight, there is a high chance you will have become accustomed to eating large quantities of food.

When you are used to this type of habitual overeating, it can be even more challenging to restrict your food intake because you feel greater hunger. That’s why a good appetite suppressant can be so useful.

By helping people to eat less food, Phentermine makes it easier to create an energy shortage in the body. This type of shortage is necessary to force the body to begin burning its fat.

How Phentermine Works

Although science proves the value of Phentermine for appetite suppression, the way it achieves this is still not entirely clear.

It appears to work by increasing neurotransmitter levels in the brain. It does this by instigating a state of fight or flight.

Fight or flight is an acute stress response. People experience it when they are in danger or encounter something that causes them to feel terror.

Fight or flight is an inbuilt self-preservation mechanism. The body releases several different hormones and there are mental and physical changes that prime the body for survival.

During Fight or flight, the body becomes capable of fighting harder, if necessary, or fleeing faster if that’s the most expedient way to survive.

Some of the hormones the body releases function as neurotransmitters. Norepinephrine, dopamine, and serotonin are three examples. All three hormones serve a number of different roles in the body. One of the things they do is reduce hunger.

When you are in a life and death situation, the last thing you need is the distraction of hunger, so it’s good that the body is programmed to respond in this way.

However, let’s not forget that, in the case of Phentermine, fight or flight is induced by unnatural means. This may be why Phentermine sometimes loses its ability to suppress appetite after only a few weeks of use.

When Phentermine stops working, it’s not feasible to increase the dose. The only answer is to stop using it altogether.

Important Phentermine Usage Considerations

As already touched upon earlier in this article, Phentermine is only available to people who are extremely overweight. It’s also a prescription drug that’s for short-term use only (maximum 12 weeks). That means, if you have a great deal of weight to lose, it won’t be able to take you all of the way. It’s a short-term helping-hand, at best.

Who Should Use It

Phentermine is for people who are overweight or obese and are offered it on prescription. Doctors can only prescribe it for people who have additional health problems that may be aggravated by their overweight condition.

Who Should Avoid It

Phentermine may be an inadvisable option for anyone who has an addictive personality. It is also unsuitable for people who have glaucoma, hyperthyroidism, or heart disease.

Women who are pregnant or nursing a child will need to avoid using Phentermine too. 

Phentermine can also cause reaction issues with some drugs and medications. It should never be prescribed for use alongside monoamine oxidase inhibitors (MAOIs) or certain other drugs used for treating depression.

People who have alcohol dependency need to avoid Phentermine as well. Mixing the drug with alcohol has the potential to cause severe reactions.

The FDA recommends against using Phentermine alongside other weight-management drugs and it’s also unsuitable for children who are under 16-years of age.

There are many instances where Phentermine may be unsuitable. So, before you accept a Phentermine online prescription, it’s important to make sure your doctor is fully aware of any changes in your medical status and/or any concerns that you have.

It’s equally important to use the drug in strict adherence to the instructions your doctor provides and to keep them informed about any negative reactions you have.

Phentermine Side Effects

As with any other drug, Phentermine presents a risk of side effects. New users who find it difficult to breathe or experience hives or swelling will need to stop using the drug and contact their doctor at once. Side effects like these often indicate an allergic reaction.

Common side effects of a less worrying nature include:

  • Itchy skin
  • Headaches
  • Dizziness
  • Dry mouth and/or unpleasant taste in the mouth
  • Changes in bowel movement (diarrhea/constipation)
  • Stomach pain
  • Increases or decreases in libido

Other Phentermine side effects may include insomnia, feelings of restlessness, and changes in mood or behavior.

If you are worried about Phentermine side effects, your doctor will be the best person to offer advice. Their knowledge and records of your medical status will allow them to tell you which side effects are more or less likely to be an issue for you.

Correct Usage

Depending on the brand, Phentermine can be in one of four different forms:

  1. Capsules
  2. Extended-release capsules
  3. Tablets
  4. Disintegrating tablets

The dosage for Phentermine is usually 37.5mg.

It’s important to only use the medication in the way your doctor tells you to use it. Your doctor’s instructions will usually be the same as the ones that appear on the box.

In the case of normal or extended-release capsules, it’s important to resist the temptation to crush or chew. You need to swallow the capsules whole. The same is true for standard Phentermine tablets.

However, if your doctor prescribes a disintegrating tablet, you will need to place it on your tongue. After the tablet dissolves, swallow it. You can do this with a sip of water if you wish to do so.

You will also need to follow the dietary recommendations your doctor provides. Unless you have mobility issues or other severe problems, your doctor will probably provide exercise recommendations as well.

Phentermine has the potential to interfere with sleep. So, unless your doctor states otherwise, it’s best to leave a gap of four to six hours between taking the medication and going to bed.

Phentermine Brands

The Phentermine weight loss drug is marketed under a variety of different brand names. The name can vary depending on geographical location. For instance, in Australia, Phentermine is distributed under the Duromine brand name.

In the USA, the drug is distributed under the following brand names:

  • Adipex 37.5mg
  • Adipex-P
  • Atti-Plex P
  • Fastin
  • Ionamin
  • Phentercot
  • Phentride
  • Pro-Fast

Depending on the brand, Phentermine may be in tablet or capsule form.

All of the above brands are genuine, authentic and legitimate.

Can I Buy Phentermine Online?

Phentermine is a prescription only medication for people who are overweight or obese. You need to obtain it via a doctor.

Anyone who looks hard enough may be able to find illegal ways to buy the drug online but, ethical issues aside, it would be unwise to try and take such a route.

Phentermine is a drug that requires strict medical supervision. This “red tape” is necessary because Phentermine can cause some people to experience side effects and other usage issues that may make it a dangerous option to use.

When people get Phentermine via legal channels, it also gives the prescribing doctor the opportunity to monitor the response to the drug and check for signs of addiction. Doctors can then take any actions that are necessary to protect their patients’ health.

So, in recap, it is illegal to buy Phentermine online without a prescription. It is also unwise. Any attempts to do so may also present other undesirable issues.

For instance, when you get Phentermine via a doctor, you can be sure you are getting the genuine drug. This is not the case if you attempt to buy it illegally online.

Many sites that appear to be selling Phentermine are actually set-up to trick people into buying a herbal equivalent. It’s very easy to be caught out.

More worryingly some suppliers may be marketing products that appear to be Phentermine but may provide alternative chemicals or drugs. It never pays to take gambles with your health. If your doctor is unwilling to prescribe Phentermine, there will be a good reason. Trust your doctor. Don’t make the mistake of trying to go over their head and buy Phentermine online without a prescription.

Phentermine Summary

Phentermine is a prescription-only weight-management drug. It’s available in the form of capsules and tablets and you always take it by mouth.

The drug suppresses the desire for food by stimulating the release of neurotransmitters in the brain.

Like many other prescription medications, Phentermine can cause side effects and may also react with other medications. The drug also presents a risk of addiction.

Although Phentermine is a respected diet pill, the negative aspects mean correct medical supervision is important. It would be very unwise to try and buy Phentermine illegally online.

Unlike most of the diet pills you can buy over-the-counter or order online, Phentermine is only intended for people who are extremely overweight. Many dieters who want to use the drug will be unable to get a prescription and will need to use something else instead.

It’s also important to be aware, the drug is only available for short-term use. Doctors only prescribe it for a maximum of 12 weeks. Depending on how well it works and/or any negative issues that occur, the prescription term may be much shorter. Either way, it’s not a diet pill that can offer long-term weight loss support.

Nevertheless, Phentermine can be a useful weight loss aid for the short-term. It can help you to eat less and burn more fat. However, there will still be a need to make healthy lifestyle changes. 

As with any other diet pill, it’s no good seeing Phentermine as the solution. Although it can be a big part of the short-term solution it won’t be able to go it alone.

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