Phentermine – benefits, side effects, and dosage

Weight loss aids are often available freely for anyone to purchase. Those that are not are typically for people with severe weight problems and can only be taken under guidance.  For obese patients, Phentermine is one of the most successful weight loss supplements. Not only can it help suppress appetite, but it can also lower blood pressure, and help with other underlying obese patients suffer from.

Today, we will share the weight loss benefits, possible side effects, and dose requirements for Phentermine:

What is Phentermine?

Phentermine is a prescription-only weight loss drug, which is often given and advised by doctors if a person has obesity, or with a body mass index (BMI) of over 30. As this drug is only available through professional guidance, it is advised for the patient to induce a lifestyle change. To encourage and sustain weight loss results, a person must exercise regularly and reduce their calorie intake.

The drug can also be given to help with other weight-related medical conditions such as high blood pressure, diabetes, and high cholesterol. 

Alongside lifestyle changes, here is more information on how Phentermine works:

How does Phentermine work?

In 1959, Phentermine was approved by the Food and Drug Administration (FDA). Since the weight-loss drug has been successful as an appetite suppressant for obese patients. 

Phentermine works by stimulating the central nervous system, the brain, and nerves. When the nervous system activity increases due to a higher amount of neurotransmitters, the effect of this is a reduction in appetite and higher heart rate. The three brain chemicals that are essential for appetite control are norepinephrine, serotonin, and dopamine.

When the appetite is suppressed, fewer calories are consumed, which leads to weight loss. 

The ingredient list of Phentermine is simple yet effective, here is more on the composition:

Composition of Phentermine

Phentermine consists of only phentermine, which belongs to a drug class known as anorectics. These drugs work to stimulate the central nervous system, which results in reduced hunger and weight loss. 

Due to its high concentration, the Phentermine drug is considered as potentially addictive. Hence, a user should stick to requirements.

Phentermine is specifically for obesity. To hear about the additional requirements, seel below:

Who can take Phentermine?

The FDA advise all users of Phentermine to be over the age of 16. Of those users, the FDA further suggest that the pill should only be taken for up to 12 weeks. Due to Phentermine causing chemical reactions to the nervous system, it could cause harm if taken for an extended period. 

Those recommended to avoid Phentermine, or seek advice before taking it, include:

  • Heart disease
  • High blood pressure that is not weight-related
  • Overactive thyroid
  • If you take other diet pills
  • Glaucoma
  • Those dealing with pregnancy or breastfeeding
  • Existing nervousness or anxiety 

For people without medical concerns and are over the age of 16 can safely take Phentermine when prescribed by a doctor.

For those uncertain if Phentermine is suitable for you, here are some options to consider:

Pros and Cons of Phentermine

FDA approvedPossible side effects
Real resultsCan only be prescribed by a doctor
Encourages a lifestyle change to sustain resultsOnly available for those who meet requirements (30+ BMI, or other related conditions)
Successfully suppresses appetite
Can reduce blood pressure, diabetes, and cholesterol 
May help with eating disorders

It is essential to weigh up these points before taking Phentermine. Although there are a few cons, the weight loss medicine has shown impressive results:

Focus on effectiveness of Phentermine 

Currently, studies reveal that Phentermine is one of the most successful weight loss drugs for obesity. When combined with topiramate, another anorectic drug for weight loss, the effects are increased. 

In the 1990s, Phentermine was misused and extracted from the industry as a weight loss aid. Yet, doctors re-evaluated and restructured the dosage requirements, which saw a considerably improved number of safe and effective cases; hence why the drug is only available through a doctor.

Clinical research shows that Phentermine can provide significant weight loss results. A study shows that obese patients who partake in regular exercise and a lower calorie diet when taking Phentermine can lose around 14 pounds.

To obtain the best results, a healthy lifestyle routine should be in place. With that, here are the dose recommendations:

Dosage: how to take Phentermine

There are a few varying concentrations of Phentermine, which require different doses. Yet, the most common version of Phentermine requires only one capsule per day. A user should eat up to one hour before taking Phentermine and swallow it whole.

If the capsule is crushed or broken, it is advised to discard and only use a whole one. A crushed Phentermine tablet can release more chemicals, which can increase the risk of possible side effects. 

In 2016, the FDA approved that the medicine can be taken in smaller doses up to three times a day. These doses should not exceed 8mg. But, it is best not to take Phentermine too close to bedtime as it can cause or heighten insomnia.

As recommended, Phentermine should only be taken for up to a 12 week term to prevent medical complications and increased risk of side effects.

Below is more information and guidance on how to get Phentermine:

How to buy Phentermine: the complete buying guide

To acquire Phentermine, you must consult a doctor. It is a prescription-only medicine that is only available to those that meet medical requirements. 

It is possible to purchase Phentermine through other sources at around $30. But, this does not ensure safety or legitimacy of the product. To prevent risk, it is essential to acquire Phentermine through a doctor. 

For more on the risks and side effects of Phentermine, see below:

Risks, Hazards, and Side Effects of Phentermine

Phentermine is a Schedule IV drug that has the potential to cause health risks and side effects. To avoid this, it is suggested to stick to the dosage specifications and only take if and when advised to. 

Due to the stimulant chemicals that affect the nervous system, the most common side effects of Phentermine are:

  • An increased heart rate 
  • Nervousness
  • Sleeplessness
  • Tingling in hands and/or feet
  • Constipation
  • Weakness
  • Headaches

If you experience any of these side effects, speak to your doctor before continuing with the use of Phentermine. Often, side effects occur at the beginning of the course, but it is good to check to avoid potential medical hazards.

Science suggests that those who currently take heart medication, are pregnant, or being treated for other conditions should avoid taking Phentermine to lower the risk of complications. 

For some additional information of the benefits, side effects, and dosages of Phentermine:


How much weight can you lose on Phentermine?

Clinical studies reveal that up to ten per cent of your body weight can be lost whilst taking Phentermine for 12 weeks. For maximum results, it is recommended to maintain and healthy exercise and eating plan.

How long should you take Phentermine?

Any user of phentermine should take the course for as long as the doctor suggests. Typically, usage is around three to six weeks and should not exceed 12 weeks. 

Is Phentermine a narcotic?

Phentermine is a Schedule IV, meaning it is a controlled substance. With it being a controlled substance by governments, it is not a narcotic. 

What should I eat while taking Phentermine?

When taking Phentermine, it is advised to reduce calorie intake. Meals should consist of healthy and balanced nutrition, such as protein, fibre, fruits, and vegetables. Water intake should be increased to help with the release of water retention. Foods to avoid include simple carbohydrates, sugary, and high-fat foods.

What happens if I skip a day of Phentermine?

A day of skipping Phentermine may reduce or reverse the benefits. As it is an appetite suppressant, a day off of taking the medicine may lead to excessive eating. It is recommended to stick to taking Phentermine daily.

Can you lose weight on Phentermine without dieting?

It is possible to lose weight on Phentermine without dieting. But, maximum results will not be reached. The drug requires a calorie deficit to work to its full potential. 

What is equivalent to Phentermine?

Weight loss aids are easily available, which work in a similar way to Phentermine. Most help to suppress appetite, burn fat, and increase energy. 

If you are seeking a natural fat burner that is accessible over the counter, PhenQ or LeanBean are an option.

For our conclusive thoughts on Phentermine, its benefits, side effects, and more:

Phentermine is a successful weight loss drug that is administered to help obese patients lose weight. Weight loss for those with a BMI of over 30 is essential to prevent health conditions. 

As the drug is safely available through a prescription from a doctor, it is advised to not purchase from third-party sellers. It can cause potential dangers if the product is not 100% similar. Doctors can also help patients create a lifestyle plan which will maximise and sustain results. 

With various side effects and hazards acknowledged, it is critical to abide by the daily dose requirements. An overdose can reverse the benefits or cause health complications. 

There are many questions surrounding Phentermine today, so if there are more concerns or feedback, please leave them with us.

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