What does Phentermine do to the body? (This is how it works)

  • By: jacob foxx
  • Date: March 26, 2023
What does Phentermine do to the body?

Phentermine is a well-known drug that helps people who are obese or overweight and want to improve their health lose weight.

The effectiveness of this medication can be attributed to its capacity to alter responses within the central nervous system, specifically neuronal signaling.

As a result of its interference with various reactions in the body, phentermine supports individuals on their weight-loss journey by providing them with a valuable tool for shedding unwanted pounds.

This drug can help you live a healthier life in a big way if you use it properly and with the help of a professional.

In this article, I’ve answered all of the often-asked questions about Phentermine by newcomers.

I’ve gone through everything in depth, from how it can affect your metabolism to how long it will take to kick in and how you can get it out of your system.

How does Phentermine work?

Phentermine is a drug that has been shown to help people lose weight and control their obesity, especially when they also have other health problems.

Anecdotal evidence suggests that off-label use of phentermine to treat attention deficit hyperactivity disorder (ADHD) may be helpful.

Available in two strengths 30 mg phentermine base tablets and 37.5 mg phentermine hydrochloride tablets; this medication is usually prescribed to be taken once a day before breakfast.

However, it is advised not to take it near bedtime due to the risk of insomnia. As per the National Institute of Health, phentermine has the potential to cause 10% or more starting weight loss, while the Williams Textbook of Endocrinology suggests that it can result in 5% weight loss within 8 to 12 weeks of its use.

As an indirect sympathomimetic, phentermine is an anorectic. Anorectics work by stimulating the sympathetic nervous system.

This stimulation causes neurotransmitters to be released, which prevents them from being taken up again by the synaptic terminals. This is thought to make people feel less hungry and give them more energy.

click to find out more about PhenQ

What effect does Phentermine have on metabolism?

Phentermine is a drug that helps people lose weight by controlling their hunger and making them feel less hungry throughout the day.

Contrary to popular belief, it does not directly affect your metabolism. The primary effect of Phentermine on weight loss is the creation of a calorie deficit, as consuming fewer calories allows your body to turn to its fat stores for energy.

Consequently, this process assists in slimming down and achieving your desired weight loss goals. It’s important to remember that Phentermine may help you lose weight temporarily, but for long-term results, you need to follow the right diet and exercise plan.

What are the side effects of Phentermine?

To make it easier for you to understand the effects of Phentermine, I’ve broken them into two groups. Now, without further ado, let’s get started.

See also  Phentermine and Surgery Guide (Hazards, Benefits, and Duration)

Positive effects

The classification of phentermine as a Schedule IV drug demonstrates its low abuse potential compared to amphetamine, which is listed as a Schedule II drug.

This difference shows the good things that phentermine can do, especially when it comes to weight loss.

A comparison showed that the combination of phentermine and topiramate is the most effective weight loss pill, with the highest chance of causing at least a 5% weight loss.

CNBC also said that this powerful combination was responsible for 75% of patients’ weight loss, which was the highest average number of pounds lost compared to other pharmaceutical options.

This evidence solidifies the value that phentermine can add to someone’s weight loss journey, all while maintaining a lower risk of abuse.

Negative effects

Phentermine, a popular weight loss drug, has been widely used as a short-term solution due to the potential for developing drug tolerance over time.

Although it facilitates temporary weight loss, it is noteworthy that the results are unsustainable, as individuals tend to gain weight once the treatment is discontinued.

Also, people who take Phentermine may have unwanted side effects like anxiety, high blood pressure, irregular heartbeat, trouble sleeping, dry mouth, headache, stomach problems, or dizziness, which can hurt their overall health.

There have been reports that people who take Phentermine may develop psychosis. This is a scary possibility.

So, it’s important to think carefully about the risks and benefits of this drug and talk to a medical professional before deciding whether or not it’s right for you.

How quickly does Phentermine enter your system?

Phentermine is known for its quick absorption into the bloodstream. This quick absorption from the gastrointestinal (GI) tract doesn’t change when taken with food, which makes it a convenient choice for many people who want to lose weight.

After taking phentermine, the peak levels of the drug will be reached in just 6 hours, so the effects of the drug can be felt quickly.

This quick absorption into the body makes phentermine even more effective and makes it a good choice for people who want to live healthier lives.

How do you flush Phentermine from your system?

Flushing phentermine from your system should be approached with the utmost caution, given its structural similarity to amphetamine.

It is strongly suggested that you talk to a doctor about how to taper the drug safely and effectively. Notably, 6% of phentermine is metabolized by the cytochrome p450 enzyme in the liver.

Discontinuing its use and allowing the liver to process the remaining drug is essential for proper elimination from the body.

Phentermine’s effects on the body usually wear off after 24 hours, but it can take up to 150 hours for the drug to leave the body completely.

Additionally, the presence of phentermine can be detected in urine tests for approximately 14 days and saliva tests for around three days.

Contrary to what most people think, science has not shown that eating more fat or drinking more water will speed up the process of getting rid of waste.

See also  Does Phentermine Expire? (How Long Do They Last)

How is Phentermine excreted?

The kidneys are primarily responsible for the excretion of phentermine after absorption in the gastrointestinal tract.

This process occurs over a mean half-life of 20 hours under normal conditions, with some variability ranging from 19 to 24 hours.

Interestingly, the elimination half-life of phentermine can be significantly reduced to just 7 to 8 hours when in the presence of acidic urine, characterized by a pH less than 5.

From the administered dosage, it is estimated that 70% to 80% of the phentermine is excreted in the urine as an unchanged drug.

But under normal circumstances, only 48% of the phentermine you take out of your body through your urine. This number goes up to 84% when your urine is acidic.

This shows how important a person’s body chemistry is to how well phentermine works and how it is processed in the body as a whole.

click to find out more about PhenQ


Phentermine is a strong drug that helps people who are overweight lose weight by reducing their appetite and making them less hungry.

But this drug should be used with care because it needs a prescription from a doctor, mostly because it can cause side effects or interact with other medicines.

To use phentermine safely, you should not drink alcohol, take certain medicines, use insulin, or deal with high blood pressure that isn’t under control.

When embarking on this weight-loss journey, it is of the utmost importance to closely monitor one’s well-being, body weight, and overall progress.

In the event of unusual side effects or a lack of noticeable improvement, it is essential to promptly consult with a healthcare professional, as they can provide the necessary guidance and support.

I'm Jacob Foxx, a proud native of the outskirts of Chicago, Illinois. I was enamored with the expansive Star Trek universe and its promise of cutting-edge technology and space travel from a young age. This early fascination with science fiction sparked my imagination and laid the foundation for my writing career. Alongside my love for the cosmos, I developed a passion for fitness in my formative years.

This dual interest in the world of tomorrow and the pursuit of physical health has greatly informed my writing, allowing me to explore themes of human potential and the future of our species. As an author, I strive to blend these passions into compelling narratives that inspire readers to dream and to push their own boundaries.

Does Phentermine Give You Energy?

Previous Post

Does Phentermine Give You Energy? (Why, and for how long will it last?)

Next Post

Why is Phentermine not Working for me? (Revealed)

Why is Phentermine not Working for me?