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How long should I take Phentermine for?

Can taking Phentermine long term cause unwanted side effects and even addiction?

woman-taking-phentermineTaking phentermine for too long can cause serious risks to health and can become addictive, so both the dose and duration of treatment can only be assessed safely following a thorough medical consultation.

Length of Treatment Considerations

Doctors will determine the length of treatment based on the patient’s age, weight, medical condition and background. Due to its habit forming nature and potential side effects the length of treatment will vary from person to person.

As it is only prescribed for short term treatment of obesity to mobilize initial weight loss which should then be continued through diet and exercise, the length of treatment cannot exceed 12 weeks. Continue reading “How long should I take Phentermine for?” »


Is it legal to buy phentermine online?

Can Phentermine be purchased online legally?

buying-phentermine-onlinePhentermine is a schedule IV regulated substance which by law is a licensed medicine obtainable only on prescription from a doctor.

Essentially this means that phentermine is a legal drug, but if it is obtained by means other than through a valid prescription, it has been obtained illegally.

The strict control of phentermine by law is due to its potential for abuse, as its amphetamine type properties mean it can become habit forming, and the risks and complicating factors associated with taking the drug require constant monitoring and control by a medical professional.

Following a full consultation with a doctor, phentermine can be legally prescribed according to the patient’s individual circumstances.

phentermine-bottlesNatural Phentermine alternatives….

Other choices for consumers include opting for a prescription-free alternative, such as Phenobestin 37.5 or Phen375, which stimulates weight loss in a similar way, but without the inclusion of the regulated drug.

Learn more about Phentermine alternatives

Why Phentermine is a regulated substance

Phentermine is both a regulated substance in the US and a controlled substance in the UK, obtainable only through prescription from a doctor for a number of reasons.

As well as its potential for abuse as a habit forming drug, only after a full examination can a doctor assess what is the correct dose, what the length of treatment should be, and whether the patient should receive an immediate or time release formula.

phentermine-studiesThese considerations need to be based on an assessment of the patient’s age, weight and medical condition.

In addition, because of the potential side effects and complications with other medications, the doctor has to monitor and control the course of treatment to ensure these factors can be mitigated as far as possible.

The patient needs to be fully aware of the risks and side effects of taking phentermine, along with things they can do to mitigate the risks such as avoiding smoking, drinking or operating machinery.

Due to the complexity of assessing the suitability of this drug and to ensure that the advantages outweigh the disadvantages, the law requires that phentermine is only available on prescription. To change this would be to put patients at risk of being misdiagnosed and receiving a potent drug which can be dangerous to health if taken incorrectly or in the wrong circumstances.

Can you buy Phentermine online with a prescription?

There are certain legitimate US State Licensed online pharmacies which will dispense phentermine online with a prescription. This can be helpful where the patient lives in a particularly remote area or is unable to travel.

In these cases extreme care needs to be taken to ensure that the pharmacy is genuine and reputable to ensure that the medication you receive is legitimate and safe.

Obtaining Phentermine online without a prescription

It is illegal to obtain phentermine without prescription, its strict legal regulation is in place to ensure it is dispensed safely and without abuse.

There are plenty of unscrupulous websites which offer ‘online consultations’ which after answering a few questions allow the consumer to purchase phentermine.

This does not equate to a genuine medical prescription and can lead to the drug being sold to those who should not receive it and where it has the potential to cause serious harm. In many cases these websites do not even sell genuine phentermine and the product could be a harmful fake.

No matter how tempting the thought of significant weight loss might be, the consumer should be very careful of obtaining phentermine illegally and at the same time posing a serious risk to their health.

Herbal Phentermine….The natural alternative without a prescription

The only way of purchasing phentermine safely online without a prescription is by purchasing herbal phentermine, a natural, safe weight loss aid not classed as a drug which can be purchased by anyone.

phenobestin-37.5Although not a direct counterpart to phentermine, the powerful natural weight loss ingredients are known for their effectiveness and do not carry the same risks and complicating factors associated with the controlled drug phentermine.

Phenobestin 37.5 is one of the most popular products in this category and does not require a prescription.

Read more about Phenobestin 37.5 in the full review here



Phentermine side effects

Do the benefits of Phentermine outweigh the
potential side effects?

phentermine-bottlesPhentermine, the prescription-only diet drug is as well known for its potential side effects as it is for its ability to significantly promote weight loss.

Generally, these side effects are deemed justifiable as the drug is only prescribed in circumstances where the advantages will outweigh the disadvantages.

It is used as a short term treatment of obesity where the individual has been unable to lose weight any other way, and where the risk of chronic disease such as high blood pressure, cholesterol and diabetes is high if weight remains uncontrolled.

As phentermine is chemically similar to amphetamine, it has the potential to be habit forming so is classed as a controlled substance. It stimulates the central nervous system to produce neurotransmitters in the brain which control feelings of hunger.

Phentermine mimics the effects of adrenalin, putting the body into flight or fight mode where heart rate, alertness and metabolism is increased allowing for more calories to be burnt instead of being stored as fat. This heightened sense of awareness and stimulation overrides natural hunger sensations so the patient will consume fewer calories and will feel fuller for longer.

Due to its habit forming nature and proof that over time the body develops a resistance to the drug, Phentermine is only prescribed for a maximum of 12 weeks, where weight loss can be as much as 5-10% of body weight.

What are the side effects of Phentermine?

Side effects of Phentermine can range from very mild to quite severe, these include; blurred vision, dry mouth, sleeplessness, irritability, bowel upsets in the first few days until the body adjusts to the medication, overstimulation, gastrointestinal disturbances, and changes in libido.

Moderate side effects include; chest pain, pounding heart, difficulty urinating, breathing difficulties or swelling.

Severe include; primary pulmonary hypertension, a fatal lung disease and cardiac valvular disease in patients receiving a combination of Phentermine and Fenfluramine (Phen-fen) or dexfenfluramine.

This combination of medication was outlawed in 1997 after 24 confirmed cases of heart valve disorder were recorded in those taking the Fen-Phen combination, and a study also showed that 30% of people taking Fen-Phen were suffering from abnormal heart valves.

When phentermine is stopped withdrawal symptoms similar to some of the side effects can occur so medical practitioners will control the cessation of the course. On completion, weight loss must be continued with a sensible diet and eating plan to avoid regain.

Can Phentermine be used alongside other medication?

phentermine-pills-in-handPhentermine can interact with other medications taken for diabetes and high blood pressure and as a result phentermine is not suitable for those with certain pre-existing medical conditions.

In addition Phentermine has been proven to react with MAO inhibitors used in the treatment of depression.

A combination of Phentermine and MAO inhibitors can lead to the potentially fatal lung disease pulmonary hypertension, and studies performed on rats also showed that this combination can lead to brain, liver and neurological malfunctions.

Why is Phentermine a controlled substance?

Phentermine is a controlled substance not just to limit the potential for abuse, but also due to the various risk and complicating factors associated with it. Available in 15, 30 and 37.5mg doses, in immediate and time release formulas, the dose will be dependent on factors such as age, weight and health.

This strict medical control is to ensure that the risks and side effects are limited and prescription only occurs where potential complicating factors are minimal.


What is Phentermine?

Phentermine – Is this the most powerful weight loss drug ever created?

woman-phenterminePhentermine is a psychostimulant which affects the central nervous system to control the appetite, primarily acting as a powerful appetite suppressant.

Phentermine shares a similar chemical form to amphetamine and forces the body to enter a flight or fight response, in which appetite is greatly reduced and the body is encouraged to burn more calories.

Phentermine has been prescribed for over 50 years and its popularity and performance as a prescription diet drug is largely unchallenged.

The demand for phentermine in all its forms is predicted to grow with the continuing escalation of the global obesity epidemic which has reached a staggering 36% in the US and 26% in the UK.

Phentermine contains hydrochloride which is an odourless, crystalline powder to be consumed orally and is soluble in water. This makes the drug more readily absorbed into the blood stream, but can interact with other medications taken for diabetes and high blood pressure.

There are other inactive ingredients in Phentermine which don’t affect the performance of the drug but relate to the colour, form, absorption and longevity. These include; titanium dioxide, talc, gelatine and corn starch.

Generic Vs Branded Phentermine

Essentially generic and branded phentermine contain the same active ingredients but have certain differences in their inactive blends which affect their colour, shape and delivery. Brands such as Adipex P contain inactive ingredients which make it an immediate release formula, whereas the brands Ionamin and Duromine both feature a slow release formula.

In certain cases, a slower, longer release delivery of Phentermine over 8-10 hours is more suitable for the patient than one which is immediately absorbed into the bloodstream.

herbal-phentermineHerbal Phentermine

The development of herbal phentermine has created an alternative treatment which promises the same weight loss results but does not have the associated side effects of regular phentermine.

These typically contain natural ingredients which work to stimulate the metabolism while reducing appetite, closely tying them to branded phentermine due to their method of action.

Popular choices include Phenobestin 37.5 and Phen375, which thanks to their natural composition and lack of harsh side effects, are both available without the need for prescription.

Is Phentermine safe?

woman-taking-phenterminePhentermine is not suitable for those with certain pre-existing medical conditions, the under 17s and pregnant and nursing women.

In addition Phentermine has been proven to react with MAO inhibitors used in the treatment of depression such as Eysam, Zelapar, Parnate, Axilect, Eldepryl, Nardil, Marplan and Furoxane.

A combination of Phentermine and MAO inhibitors can lead to the potentially fatal lung disease pulmonary hypertension. Studies performed on rats also showed this combination can lead to brain, liver and neurological malfunctions.

Possible side effects include blurred vision, dry mouth, sleeplessness, irritability, stomach upset or constipation, gastrointestinal disturbances, and changes in libido. Much rarer reported side effects include chest pain, pounding heart, difficulty urinating, breathing difficulties or swelling while taking this medication.

Due to the above issues Phentermine is usually prescribed for a maximum of 12 weeks and as stopping treatment can lead to withdrawal symptoms similar to some of the side effects, medical practitioners will strictly monitor the cessation of the course.

This is not the case with natural Phentermine alternatives which do not require a prescription, these can normally be taken for 6-12 months where side effects are often rare and typically mild in nature.


Phentermine is a prescription diet drug which is used as a short term treatment of obesity where other alternatives have failed and where uncontrolled weight poses a serious risk to long term health in the form of diabetes, high blood pressure and cholesterol.

It is designed to be used as the first step in a healthy diet and lifestyle plan to instigate initial weight loss which can then be maintained by diet and exercise.


Common Phentermine alternatives

Our round up of the best non-prescription Phentermine alternatives

phterminePhentermine has been the most highly prescribed diet drug since its FDA approval in the 1950s for the short term treatment of obesity. Users can expect to lose between 5-10% of their initial body weight after completing a course.

It is a controlled substance which can be habit forming, prone to side effects and ineffective over longer periods of time. As a result phentermine is only prescribed for a maximum of 12 weeks to initiate weight loss where risks to health are significant if reduction isn’t achieved.

Phentermine is available in branded and generic forms, and can also be found combined with other drugs such as topiramate in Qsymia, a diet drug due to be available in late 2012 early 2013.

Non-prescription alternatives to Phentermine

There are a number of commercial Phentermine alternatives now available which promise to deliver similar results as seen with its drug-based version, but do not pose the same associated health risks and side effects.

Phenobestin 37.5 and Phen375 are popular options in this category – both manufactured to strict standards using premium quality compounds. The ingredients in these prescription-free alternatives are typically proven to increase the metabolism, while also suppressing the appetite.

This combination of calorie restriction and increased fat burn (which is the basis of branded Phentermine) can contribute to significant weight loss.

There are a wide variety of other natural weight loss supplements available which can provide an alternative to phentermine. These come in the form of appetite suppressants, fat blockers, fat burners and energy boosters. These can be found in local chemists, supermarkets and health food shops and are available to buy over-the-counter.

Even natural supplements can cause side effects, especially as many contain natural stimulants which can lead to insomnia, raised heart beat and irritability, but generally they are safe and effective to use, even for long term weight loss.


Prescription-only alternatives to Phentermine

There are a number of prescription drugs which are available to overweight patients in addition to Phentermine. The lipase inhibitor Orlistat, sold under the brand name Xenical works by blocking the absorption of fat from foods which are then excreted from the body.

This option is also not without side effects, liver and gastrointestinal problems are common such as frequent, loose bowel motions, and it can affect the body’s ability to absorb nutrients from foods as well as certain medications.

As with phentermine, the suitability of orlistat will be assessed by the medical professional before prescription, as it is unsuitable for people with certain health problems issues including: gall bladder problems, chronic malabsorption, along with certain liver, kidney, thyroid or eating disorders.

Orlistat is also available over the counter at half the strength of Xenical, this is sold as Alli.

Exercise and Healthy Eating as an Alternative to Phentermine

Phentermine itself is designed only to play the first part in weight loss which should be continued through diet and exercise.

For those in the morbidly obese category a sedentary lifestyle and uncontrolled eating means a sudden diet and lifestyle change is too daunting or ineffective, and phentermine creates a much needed kick start to weight reduction.

Phentermine is not to be considered for cosmetic weight loss, especially where diet and exercise provide an easy alternative, or where the risks to health are not significant enough to justify the risk factors associated with this potentially harmful drug. Those who are not deemed to be morbidly obese should consider other options first.


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