All About Phentermine

Why phentermine, a weight loss drug that has been around for decades, is still the most sought after diet pill today.

After many decades (and the lauch of hundreds of new diet pills),  this medication has stood the test of time and is still the most popular diet pill sought out today.

I remember back as a kid, it was in style for many people to take these pills for different reasons. The two main reasons were if you wanted to stay up for long periods of time without the need for sleep (they were popular with workers such as  long haul truck drivers) and for housewives who wanted to dramatically curb their appetites for weight loss.  

Back then we used to call them robin eggs and sadly they were used too freely within some circles.  Robin eggs are the pills pictured below with usually blue (but sometimes pink) markings, giving them the nick name robin eggs.

Because phentermine actually delivers on its promise of eliminating hunger and offering a ton of energy, it’s no wonder they are still the most desired weight loss pill today.  Yes, it’s true, this pill can definitely help you lose weight.  

But there are many questions about these pills including where you can get it and what are the unwanted side effects it has.  

Once these questions have been answered it will be easier on each of us as individuals to make better decisions of whether this drug should be part of our lives.

What is phentermine (phentermine hydrochloride)?

It is a prescribed weight loss drug that is an appetite suppressant and is also a controlled substance.  This drug binds to the receptors on the hypothalamus and works on the neurotransmitter chemicals in the brain to reduce the hunger levels in an individual.  This also means it does effect the central nervous system.

It has been around for many decades and is still prescribed for helping with obesity.

It is also known by other names such as Adipex-P, Lomaira as well as some street names such as fen-phen, robin eggs and street speed.

What does it do?

Its main function is to suppress a persons appetite while providing the body with energy.

Who should take it?

It should only be taken under your doctors advice.  It can be very helpful for people who are obese and have little resources left that can help them.  It can also be very helpful for people with extreme fatigue.

How should you take it?

Take it exactly as your doctor prescribes.  If you miss a dose, just take the next dose at your scheduled time.  Never double up doses.

This pill usually comes in a 37.5 mg. strength and is taken orally.  How often it should be taken should again be decided with your doctor depending on your circumstances.

This medication works at its best when combined with a healthy diet plan and some daily exercise to get the best results. 


Should not be taken with any other diet pills.

Do not use if you are pregnant or breast feeding.

Do not take these meds if you have any kind of history of heart disease, hard to control high blood pressure, overactive thyroid, glaucoma or if you have any kind of drug or alcohol problems.

Also avoid this drug if you are taking any MAO inhibitors which are mainly used for depression.

This drug can be very addictive.  So for anyone who battles drug and alcohol addiction, avoid this drug. 

Anyone under the age of 16 should not take phentermine.

What are its side effects?

Here is a list of side effects that may happen:

Feeling restless or hyperactive



Upset Stomach

Mild headache


Dry mouth

Bad taste in your mouth

More serious side effects may include:

Pain in chest, arm or jaw

Swelling in legs or feet

Shortness of breath


Trembling and shaking

Temporary weakness or troubles waking 

Rash or itchy skin

Inability to get an erection

Lack of sexual desire

Inability to sleep

Problems with clear thinking

Any unusual feelings such as feeling invincible (euphoria) or feeling unease or dissatisfaction (dysphoria).


The most serious side effects include:


Fast heart beat

Heart palpitations



High blood pressure

Low blooe pressure 

Pulmonary hypertension

In Extremely Rare cases heart failure or sudden death.

If you stop taking phentermine after taking it for a long period of time you may experience withdrawal symptoms such as depression or fatigue.

Always tell your doctor if you are experiencing any of these side effects. 

How much does it cost?

This medication is relatively inexpensive compared to many other diet pills and supplements.  Depending on your insurance/health plan it can be anywhere between zero dollars up to $30.00 for 30 pills. 

It’s reasonable in price because it has been around forever and is high in demand.

Where can you get it?

As mentioned above, you need a prescription from a doctor to get the real phentermine because it’s a controlled susbstance and can be addictive.

Beware of scammers that say they are selling the real thing.

There seems to be several sites that claim they are selling the real thing without a prescription.  Please take extra caution when on these sites.  Phentermine is a controlled substance that is only available with a prescription.

Return to Types of Diets

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Well even though we’ve discovered that phentermine is a great drug for weight loss, we also now know why you need a prescription to get it.

This medication can still help many people who need to lose weight.  So if you think you or a loved one would benefit from this medication, then go see your doctor.

Wishing you health and happiness.

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