What is the Difference Between Duromine and Phentermine

Duromine and Phentermine: How It Works

 - Updated on August 4, 2022

You may be wondering which medication works more quickly and effectively for weight loss? What are possible side effects? Let’s see the difference between Phentermine and Duromine so that you can make an informed decision.

Duromine vs. Phentermine: Presentation and Dosage Form

We know that both medications for obesity treatment have the same active ingredient – phentermine. However, the key difference between them is the drugs’ presentation and phentermine doses.

What Duromine looks like

Duromine capsules are available in three doses in packs of 7 or 30 capsules:

  • Duromine 15mg – grey and green capsules, marked Duromine 15;
  • Duromine phentermine 30mg – grey and reddish-brown capsules, marked Duromine 30;
  • Duromine 40mg – grey and orange capsules, marked Duromine 40;

What Phentermine looks like

Phentermine is available in bottles of 30 capsules or soluble tablets:

  • Phentermine 15mg and 30mg – usually blue or white and blue capsules but color and markings may differ depending on the manufacturer;
  • Phentermine 37,5mg – white tablets with blue specks;

Duromine and Phentermine: How It Works

Phentermine and Duromine are anorectics. What does it mean? The primary mechanism of action in anorectics is appetite suppression. They stimulate the release of chemical agents and neurotransmitters in the brain, which affect the sense of satiety, increasing your heart rate and blood pressure and decreasing your appetite. Once absorbed into the blood, they cause an energy surge that increases your blood pressure and heart rate.

As soon as the level of the agents increases, you no longer want to eat everything you see. So, when wondering about “How much weight I will lose in a week on Рhentermine,” get ready to lose approximately 3 kg or more during the first week. The chances become even higher if you follow a healthy lifestyle: eat right and exercise more.

Duromine against Phentermine: Duration of Action and Composition

In the Duromine vs. Phentermine race for the title of the medication with a softer and more long-lasting effect, Duromine certainly wins.

Phentermine is a pure medication with a few additional components and a rapid action onset. Following the drug administration, Phentermine reaches peak concentrations in the body quite fast. Then, it gradually decreases by the end of the day.

Duromine contains phentermine as an ion-exchange resin complex, which slowly and softly releases throughout the day. It constantly controls your appetite, preventing you from overeating.

Duromine vs Phentermine: How to get

Duromine and Phentermine may cause side effects. That is why the medicines are sold only with a doctor’s prescription.

Besides that, Phentermine and Duromine administration is usually coupled with doctor-approved exercises, lifestyle changes, and a reduced-calorie diet.

After a conversation, an experienced doctor will prescribe you the necessary dose of medication and explain the administration schedule.

You can also find trusted Duromine 30mg phentermine suppliers on our website. Sign up, learn more about the current Duromine prices, and order the medications. You can also check out Phentermine cost, Рhentermine 30mg price there.

The duration of use depends on the course prescribed by your doctor. An average course of treatment should not exceed three months. In exceptional cases, if you don’t have side effects, your doctor may prolong the treatment.

Duromine is one of the most effective weight loss medications, and typically patients are happy with what they get. However, if the results haven’t been achieved and/or aren’t satisfactory after the first course, it is recommended to take a break before the next one.

Duromine vs Phentermine: Contraindications

Let’s compare the main contraindications to Phentermine vs Duromine.



  • Pulmonary artery hypertension
  • Cerebrovascular disease;
  • Severe cardiac disease including arrhythmias, advanced arteriosclerosis;
  • Hyperthyroidism;
  • Psychiatric illness including anorexia nervosa and depression;
  • Glaucoma;
  • History of drug/alcohol dependence;
  • Pregnancy and lactation;
  • Not recommended for children under the age of twelve.
  • High blood pressure;
  • High blood pressure in the lungs;
  • Existing heart valve abnormalities;
  • Diseases related to blood vessels in the brain;
  • Arrhythmia;
  • Narrowing of the blood vessels due to thickening or hardening of the blood vessel wall;
  • Hyperthyroidism;
  • Psychiatric illness including Anorexia nervosa and depression;
  • Glaucoma.


Duromine vs Phentermine: Side Effects

When discussing the long-term side effects of the medications, we should mention that due to the slow release of the active ingredient, Duromine has milder adverse reactions than Phentermine.

In general, the side effects of both drugs are similar. Still, it doesn’t mean you will have any of them:

  • dysphoria
  • dizziness
  • insomnia
  • euphoria
  • tremor
  • headache
  • psychosis
  • dry mouth
  • gastrointestinal disturbances
  • sleeping disorders.

To learn more about the side effects, read our expert opinion article.


As you can see, these medications have very similar indications and contraindications. The main difference lies in releasing the active ingredient and its effect on your body. It’s up to you and your doctor to choose a medicine that will help you lose weight fast and effectively.

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