Medical Advice

Phentermine vs Adipex for Weight Loss

Phentermine vs Adipex

Being overweight and obesity are common health issues among many US citizens. The main obesity causes are poor diet, a sedentary lifestyle, lack of exercise, etc. Meanwhile, this can lead to obesity health risks. Such risks can be heart disease, sleep apnea, high blood pressure, liver disease, high cholesterol certain types of cancers, etc.

To avoid all these risks, it is necessary to take action to control the weight. There are widely prescribed medicines that can aid you to reduce your overweight problem. For instance, Wegovy, Phentermine, Ozempic, Bupropion, Adipex, etc. In this blog, you’ll know about two medications Phentermine and Adipex, that are used to manage weight. You’ll also know the Phentermine vs Adipex differences, uses, Similarities, and more.

What is Phentermine?

Phentermine is a generic drug that is used in treating obesity or overweight problems. The medicine belongs to the anorectic drug class. It is also known as an appetite suppressant. Furthermore, the medicine falls under the Schedule IV Controlled Substance Act. This drug is mainly prescribed by doctors, to those obese persons who are above 18 years old.

The medicine has many brand names such as Adipex, Lomaira, etc. However, there are several other drugs to treat overweight health conditions. Such medicines are Semaglutide, Saxenda, Mounjoro, including phentermine. However, before using any drug. Getting a prescription is a must to get results according to your health condition.

If you are suffering from health problems with obesity, then consult with a doctor about your health condition. Avoid taking Phentermine drug, if you are suffering from health conditions such as:

  • Diabetes
  • High blood pressure
  • Glaucoma
  • Kidney disease
  • Overactive thyroid
  • Seizures
  • Complications in the lungs
  • Heart disease

What is Adipex?

Adipex is a branded medicine that contains Phentermine generic drug. It is sold under many brand names. Such trade names are Lomaira, Lonamin, Fastin, Suprenza, Atti-plex, Phentercot, Phentride, etc. It is a weight-reducing medicine.

That belongs to the anorectic drug class and is categorized under the Schedule IV Controlled Substance Act. The medicine is not intended to be used for pregnant women and obese persons who are below 16 years old. It is a widely prescribed medicine in the USA to treat obesity concerns.

Along with Phentermine it also comprises inactive ingredients, such as Corn starch, lactose anhydrous, magnesium stearate, microcrystalline cellulose, etc.

The medicine is a prescription drug and has the potential to be abused. Therefore, it should be used after getting a prescription from a doctor, for the recommended duration, to get better results of Adipex. The drug is produced by Teva Pharmaceuticals based in the USA.

However, patients with diabetes, glaucoma, high blood pressure, and mental illness should avoid taking the medicine because it may cause further health complications.

Comparison of Both Drugs: (Phentermine vs Adipex)

Phentermine Work

The Phentermine tablet’s main work is to increase norepinephrine in the hypothalamus system in brain function. This generic drug is an adrenergic agonist that acts on the neurotransmitters. It increases norepinephrine in the hypothalamus, and diminished appetite also improves the resting energy of individuals. Through this, it helps individuals to reduce weight.

Adipex Work

The precise mode of action of Adipex is to help individuals lose excess weight. It is believed that this medication works by stimulating the CNS which leads to the reduction of appetite.

The medicine stimulates the Central Nervous System (CNS) which increases heart rate, and blood pressure and decreases appetite. If you are suffering from obesity for a long period and are unable to reduce your weight, then you can take the help of this medication under a doctor’s consultation.

Dosages: Phentermine vs Adipex

Phentermine is available in four forms, oral tablets, oral capsules, extended-release capsules, and disintegrated oral tablets. All come in five dosage strengths with different imprinted initials. Some dosages are as follows-

Adipex is also available in various dosage strengths such as

  • Adipex 15 mg ( oral capsule)
  • Adipex 30 mg (oral tablet)
  • Adipex 37.5 mg ( White capsule)
  • Adipex-p 37.5 mg ( Blue&white specks oval tablet)

Similarities Between Phentermine and Adipex:

  • Both medicines are used in treating overweight health conditions.
  • The two weight loss drugs are used after getting a prescription.
  • Both medicines belong to the same drug class.
  • Phentermine and Adipex fall under the Schedule IV Controlled Substance Act.
  • Both medicines are considered appetite suppressants and work on the brain’s neurotransmitters to control appetite.
  • The two drugs are FDA-approved to manage weight in individuals.

Differences between Both Drugs: Phentermine vs Adipex

  • Phentermine is a generic drug, while Adipex is a branded medicine.
  • Phentermine is not admissible to those who are under 18 however, Adipex is allowed to those who are above 16 years old.
  • The two drugs are manufactured by different companies.
  • The dosage strengths of Phentermine and Adipex also vary.

Uses Instructions of Both Medicines:

Following are the uses of both medicines.

  • Take the doses as directed by the doctor.
  • Do not crush and chew the tablet while in the mouth.
  • Do not give and suggest the drugs to another obese person without a prescription.
  • Take the medicine as per your health condition and age.
  • Do not exceed the time, take the drugs for the recommended duration and

Side Effects of Adipex and Phentermine Drug:

While consuming Phentermine and Adipex should be aware about the side effects as well.

Common Side Effects of Phentermine :

  • Body itching
  • Dry mouth
  • Diarrhea
  • Constipation
  • Stomach pain
  • Dizziness
  • Headaches
  • Dysgeusia
  • Restlessness
  • Trouble while sleeping
  • Breathing problems

Serious Side Effects

  • Pounding heartbeat
  • Mood swings
  • Agitation
  • Hallucinations
  • Convulsions
  • Nervousness
  • Uncontrolled muscle movements
  • Sexual problems
  • Severe headache
  • Trouble speaking
  • Seizure
  • Blurred vision
  • Weakness

Precautions for Both Drugs:

While using Phentermine and Adipex drugs, keep in mind the following precautions.

  • Pregnant women should not use these drugs.
  • Before using the medicines, get the right information about the use of drugs.
  • Keep the medicines out of the toddler’s reach.
  • Store it at room temperature.
  • Avoid consuming alcohol and meat throughout the medication period.
  • Read the product label carefully before using the medicines.


To get rid of obesity you can follow options such as medication, exercises, yoga, disciplinary diet etc. However, exercises and diet plans do not work for all. Here you can use medicines like Phentermine and Adipex medications.

In this blog, you get the idea of the use of medicines which may help you to reduce weight. However, before using any medicine get a consultation from a good doctor to get better results.

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