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Phentermine for Weight Loss

You can adopt a variety of supplements and methods to maintain a healthy weight. In this regard, the medication Phentermine is trending these days you might try it for weight loss as well. Let us help you understand Phentermine’s mechanism, benefits, side effects, and some essence for making a swift decision.

Introduction to Phentermine

Phentermine belongs to a class of medications called anorectics. It works by suppressing your appetite. It is a prescription medicine for speedy weight loss. Phentermine belongs to the type of drug known as sympathomimetic amines. Therefore, these are more commonly known as stimulant drugs.

How Phentermine Works for Weight Loss

Phentermine works as an appetite suppressant and can help people lose weight along with diet and exercise. Phentermine is such a popular medicine that works effectively in short-term weight loss if we follow it with a reduced-calorie diet and exercise.

Also, we can take Phentermine combined with topiramate for long-term weight loss (Qsymia). Phentermine is approved for use for up to 12 weeks, but according to weight management time, some healthcare providers might order it for longer use.

Phentermine blocks the brain’s hunger signals by increasing the release of catecholamines in our body. These are the chemicals made by our adrenal glands. These hormones increase our heart rate and decrease our appetite. So burning more energy with taking fewer calories, many patients experience dramatic weight loss.

Benefits of Phentermine for Weight Loss

Phentermine can help you lose 3% of your initial body weight after three months and 5–7% after six months. You can expect to lose anywhere from 3 lbs to 5 lbs a month on phentermine. Remember that phentermine is for short-term use only (a few weeks).

However, not everyone responds the same way to phentermine. If you haven’t lost much weight after three months of using it, a healthcare professional may recommend discontinuing the medication.

Precautions Before Using Phentermine

Before using Phentermine, several conditions must be followed:

  • First, take a consultant from your doctor or pharmacist
  • Measure your weight and age before use
  • Discuss your medical history with your doctor
  • Check blood sugar if you have diabetics
  • Check if you have any allergies.
  • Know the accurate doses of Phentermine accommodated by your doctor.
  • Discuss with your doctor if you are an alcoholic before taking this drug.

When to avoid Phentermine

  • Under age 18: Children under 18 or younger should avoid it.
  • Senior adults: The kidneys of older adults may not work after using it, or it works slowly. As a result, a higher amount of a drug stays in your body longer. This may raise some side effects.
  • During Pregnancy: This drug is not recommended if you are pregnant or think to be pregnant; it may harm your unborn baby.
  • Breast-feeding women: It is not recommended while using this medicine cause it may cause some reactions in your baby.
  • People having heart diseases: These include stroke, arrhythmia (irregular heartbeat), heart failure, coronary artery disease, valve disease, and uncontrolled high blood pressure. However, Phentermine may increase your blood pressure and make your heart work harder.
  • People have glaucoma: This drug can increase eye pressure and permanently hamper vision.
  • People have thyroid: Discuss with your doctor if you have thyroid cause it can increase your thyroid activity. Further, it can raise your thyroid level.
  • People having primary pulmonary hypertension (PPH): You shouldn’t take phentermine. It may make your PPH worse.
  • People with agitation: This drug may cause restlessness and anxiety and worsen your fever. So, you should not take phentermine if you’re agitated.

Side effects of Phentermine

Here are the potential side effects of Phentermine:

  • Dry mouth
  • Insomnia
  • Nervousness
  • Increased heart rate
  • Elevated blood pressure
  • Dizziness
  • Headache
  • Constipation
  • Diarrhoea
  • Unpleasant taste in the mouth
  • Changes in libido
  • Mood swings
  • Restlessness
  • Shortness of breath
  • Swelling in ankles or feet

Remember that these side effects can vary from person to person who takes Phentermine. You can consult with your doctor if you experience any of these symptoms.

Doses of phentermine and storage

The dose of this medicine will be different for different patients. So you should follow your doctor’s advice and the directions.
Also, the amount of medicine you take depends on the strength of the drug.

Phentermine For the treatment of obesity:

For oral dosage form (capsules):

  • Adults and children 18 years of age and older:- 15 to 30 milligrams (mg) once a day, taken approximately 2 hours after breakfast.

In the form of an oral dosage (disintegrating tablets):

  • Adults and children 17 years and older:- One tablet once daily, taken in the morning.

For oral dosage form (extended-release capsules):

  • Adults and children 16 years of age and older:- One capsule once a day, taken before breakfast or 10 to 14 hours before sleeping.

In the form of an oral dosage (tablets):

  • Adults and children 17 years and older:- Lomaira™: One tablet thrice daily, taken 30 minutes before meals.

Phentermine:- 18.75 to 37.5 milligrams (mg) daily, taken before or 1 to 2 hours after breakfast.

Missed Dose

In case you missed it, take it as soon as possible. If it’s almost time for your next dose, skip the missed dose and follow your recommended regular dose schedule. Avoid taking double doses.


  • Store the medicine in a closed container at room temperature- avoid excess heat, moisture, direct light, and freezing.
  • Keep away from children
  • Do not keep outdated medicine
  • Ask your healthcare professional how to dispose of any medicine you do not use

End Thoughts

To conclude, Phentermine can be a valuable aid for maintaining a healthy weight and boosting your weight loss journey in line with correct medical guidance and a healthy lifestyle.

We saw how phentermine reduces risk factors for heart disease, high blood pressure, and diabetes. However, this medication is only for some who have a high BMI. It’s a fact that weight loss is a gradual process. So you need to have patience and awareness about the medication. Once you follow so, you can rest assured of reaching your ideal weight by following a diet and lifestyle plan.

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