Ultimate Guide To Phentermine – How Does Phentermine work As A Diet Pill To Lose Weight & Boost Energy?


How Does Phentermine work

How does phentermine work? Is it an effective diet pill to lose weight, crush appetite and boost energy? Phentermine is a prescription diet pills recommended for obese people who are enrolled into weight loss arranged program. This diet pill is only a prescription diet and should be used only for a short period of time.

This diet pill is renowned for suppressing appetite and boosting energy retention and is a direct replacement for the notorious amphetamine pills. And it’s also classified as a controlled substance.

How Does phentermine Work

If you have heard of diet pills that work without exercise, phentermine pill is not among (none so far that we have come across) neither is it a miracle diet pill as most people are meant to believe. Phentermine doesn’t magically burn fat or melt away your pounds either.

So what does phentermine do?

However, this diet pill makes it easier for you to lose weight only if you add some extra work on your part. For instance, you have to hit the gym almost every other day and you need to have less of calorie in your food. Phentermine can help you reduce hunger or food craving and also boost your workout performance by giving you more energy to perform your everyday task. This makes it possible for you to live a healthy lifestyle through healthy eating.

In this comprehensive ultimate guide to phentermine diet pills, you will learn how this diet pills work, its benefits (if there is any) potential side effects, how to use it to lose weight and most of all what are other diet pills that work just like phentermine that are also approved by FDA.

Here are some ways phentermine works in your body

1. Its An Appetite Crusher

Phentermine works with the brain to signal a fight-or-flight response. This pill arouses the adrenal gland to release the neurotransmitter caled norepinephrine, serotonin and dopamine which signal to the brain of a satiating effect.

By sending this neurotransmitter, it tells the brain that the body is in a state of fullness so as to minimize hunger and reduce food cravings. Although, the appetite suppressant nature in phentermine varies according to users, nevertheless people will still experience less hunger compared to when phentermine is not in the body.

2. Phentermine Increases Energy Levels

Through the release of adrenaline in the body, phentermine improves the odds to increase energy production by stimulating various bodily functions to increase glucose level and fatty acids in the body. Phentermine also helps to deal with physical exhaustion caused by increasing energy production within your body cells thereby allowing more blood to flow to your muscles and more oxygen to flow to your lungs.

The fight-or-flight response from phentermine makes it possible to use this signal to fight against any danger or flee away as the case may be.

phentermine ingredients

multivitamin ingredients

The most active compound found within the phentermine makeup is phentermine hydrochloride or phentermine Hcl.

Phentermine Hcl is a stimulant of the central nervous system that tells your brain to respond to any fight-or-flight calls. This is how phentermine react and suppresses appetite and increase energy.

This is a complex medication and therefore its usage is strictly subject to medical directions – for instance, its not advised to take phentermine in doses that is not recommended (dont take more than recommended) do not take phentermine as often as you desire and do not take for a longer period of time.

Too much of phentermine in your system can cause various effects including getting you addictive causing mental and physical dependence.

Phentermine medicine is available in four different forms

  1. disintegrating tablets
  2. extended-release capsules
  3. capsules
  4. tablets

You need to take the form that best suits you by carefully following the instructions. for instance if you are taking the extended-release capsules, you need to take it whole i.e. you dont have to break, crush, or chew it.

You can take the disintegrating tablets with or without food – just make sure your hands are dry before touching the tablets and put right on top of your tongue the moment you remove it from the bottle or sachet pack. if this is done correctly, the moment it touches your tongue it starts to melt and when its melted, you can take water to flush it down.

Swallow the tablet form whole. Do not crush, break, or chew it.

As it is, you need to comply with your doctor’s less-calorie meal plan and exercise regimen. if you are in doubt to your best workout program you can discuss with your personal fitness coach and if you don’t have any, your doctor is in the best place to advise you on what you need to work on.

If you do not want to have sleepless night, you can take the pills 4-6 hours before bedtime unless your doctor says otherwise.

Phentermine Doses

Phentermine doses actually depend on the user and your doctor’s recommendation. For safe doses follow what is on the pills label. The following information includes only the average doses of this medicine. If your dose is different, do not change it unless your doctor tells you to do so.

Note that the instruction on the bottle label is actually dependent on the strength of the medication. Also, the time between doses, the numbers of doses to take each day depend on the medical problem for which you are using the medicine.

For treatment of obesity:


For oral dosage form (capsules):

Adults – 15 to 30 (mg) once a day, taken at approximately 2 hours after breakfast.

Not recommended for Children 16 years and younger.

For oral dosage form (disintegrating tablets):

Adults – 1 tablet once a day, taken in the morning. Children not recommended for Children 16 years and younger.

For oral dosage form (extended-release capsules):

Adults – 1 capsule once a day, taken before breakfast or 10 to 14 hours before bedtime.

Not recommended for Children 16 years and younger.

For oral dosage form (tablets):

Adults – 1 tablet three times a day, taken 30 minutes before meals. Phentermine: 18.75 to 37.5 (mg) once a day, taken before breakfast or 1 to 2 hours after breakfast.

Not recommended for Children 16 years and younger.

Missed Dose

If you missed a dose, do not try to double dose on the missed dose. You can take it as soon as possible, but if your next dose is near, skip the missed dose and go back to regular dosing.

When you have overdosed on phentermine, here are some possible symptoms to watch out for:

·         Restlessness

·         Shakiness (tremor)

·         Rapid breathing

·         Confusion

·         Violent behavior

·         Hallucinations

·         Panic

·         An irregular heart rhythm (arrhythmia)

·         High blood pressure (hypertension) or low blood pressure

·         (hypotension)

·         Nausea and vomiting

·         Diarrhea and cramps

·         Seizures

·         Coma

·         Loss of life.

Treatment Of Phentermine Overdose


The best treatment for phentermine overdose is the popular “pumping the stomach” approach – this involve an healthcare provider placing a tube in the stomach to extract the medicine (i.e if the incident is recent) and you can also resort to supportive medical care – which consists of treating the symptoms that occur as a result of the overdose. For instance, medications may be necessary to decrease the heart rate and blood pressure. If you think you have overdosed on phentermine, it is advisable to seek medical attention immediately.

Phentermine overdose can be very dangerous so it is important to seek help when needed.

Phentermine Half Life

It has a half-life of about 24 hours which is the time it takes phentermine dosage to be transformed by the liver or flushed out through urine and It takes five to six half-lives for drugs to be almost completely eliminated from your system.

How Long Does Phentermine Stay in Your System

Phentermine can stay up to 24 hours in the blood and up to 30 days in hair test. It can also take about 4 days to detect phentermine in urine test. However, this detection varies according to amount of phentermine in the body and a whole numbers of factors.

How Long Can You Take Phentermine

Taking phentermine for a long time is not recommended as

  • can cause serious side effects
  • Can become very addictive
  • Becomes less effective after prolong use
  • affect your heart rate

while phentermine is very useful in helping you to lose weight, it is important to understand that using this diet pill for short term is the best because using it for a long time might possibly affect your hear rate.

Effects of Phentermine Withdrawal

Low Mood

When phentermine is ingested, it takes control of your mood regulating hormones (dopamine and norepinephrine). When you quit using this drug you are likely going to encounter some form of depression symptoms like sadness, low mood, and fatigue.


When you stop using phentermine, it may ends up making you feel weak, fatigued, and drowsy because your brain will work without the drug. According to drugs.com, patient who took high dosage of phentermine for a prolonged period are likely to have severe weakness, impaired cognitive functioning until withdrawal subsides.

Weight Gain

If you quit using phentermine, you are most likely going to start gaining weight (the reason for this is yet to be understood) but it can be adduced to increase in food consumption (more calories in food) and lack of adequate workout. The amount of weight gain during withdrawal is not known as it varies depending on dose, length of treatment and diet including exercising.

Phentermine Long Term Side Effects


One of the prevailing side effects with long term use of phentermine is the inability to sleep also referred to as insomnia. According to drugs.com, some chemical ingredient inherent in phentermine affects some parts of the brain that is responsible for making people fall asleep.

Because these natural brain chemical may have been altered during the use of phentermine, it becomes more difficult for user to fall asleep at night – which ultimately leads to excessive fatigue and drowsiness during the day. If such effect (not able to sleep at night) happens after phentermine intake, the user should quickly seek medical attention.

Erectile disfunction

Inability of user to get a good sexual erection is possible with long term use of phentermine.

Phentermine Tablets vs Capsules

Tablets vs Capsules

Phentermine drugs comes in different forms either in capsules or in tablets. Although many users might not be aware of the difference between the two (even though they work in similar fashion).

For decades, people have been taking medicine in either liquid or powder form, then later on advancement with technology came and chemist were able to compress the powder and turn it into pills with some added extra substances. This was the origin of tablet and capsules, making them the most common forms of medicine in the world today.

As stated earlier there is no much difference between this two forms of medicine except that:

Phentermine Tablet

The phentermine tablet when taken orally can take some time before reacting. It takes a while for the tablet to be absobed into the bloodstream this is because the tablets need to firstly get swollen then start melting in the body before it can release its active ingredient.

Phentermine pills have been used to treat obesity for years and have become one of the most popular weight loss medications. One disadvantage of this form of phentermine is the delay in its working.

While the good side to this pill is that you can easily divide the pill up into pieces and have more control over what you take in. Phentermine tablets comes in different doses – 15mg, 30mg or 37.5mg at retail pharmacies

Phentermine Capsule

Condensing a medicine into capsule form is one of the modern ways for taking medications. A capsule is a pill in the form of a small rounded gelatinous container with active ingredients inside ingested into the gastrointestinal tract (GIT). The capsules contain active medicines that are absorbed into the bloodstream faster than with a tablet.

The capsules also come in different doses (although unlike tablet) it cannot be broken into pieces before taken. You can find phentermine capsules in doses of 15mg, 30mg, and 37.5mg.

Phentermine Tablets or Capsules?

As you can see there is no much difference between the two phentermine pills except one is quick to digest than the other and one can be broken into pieces before ingestion while the other cannot.

These are just the minor difference you will notice between these two forms. The most important thing about phentermine tablet or capsule is that they both contain same active ingredient which means they both have the same effects on the brain and the nervous system.

How Quickly Do You Lose Weight on Phentermine?

Phentermine pills are only recommended to be taken for short term basis and shouldn’t be more than 12 weeks. The question is, can obese people experience weight loss within these 12 weeks and how much of body fat can be dropped using phentermine pills?

Unfortunately, there is no real answer to such questions. The fact of the matter is that phentermine is a very powerful anorexigenic drug that have been used successfully time without numbers to treat obese people – suppressing your appetite and boosting your metabolism.

Even when the dose is of the same, users still experience difference in the amount of weight they lose. The amount of weight lose by individual depends on two main factors:

  1. How their body reacts to phentermine
  2. How much they really want to lose weight

Best Phentermine Alternative To Burn Fat Fast


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