Phentermine 2018-01-12T07:28:15+00:00

What is Phentermine?

Phentermine is an appetite suppressant drug approved by the FDA. It has proven to be an effective weight loss drug when paired with proper diet and exercise.

Benefits of Phentermine

Phentermine has the added weight loss benefit of promoting the body to metabolize body fat. Not only will Phentermine help your body with its metabolism rate, but it will also help reduce cravings for food and snacks by giving you the sensation of fullness. Increasing your metabolism and reducing your cravings is a winning recipe for weight loss.

There have been many clinical studies conducted which back up the weight-loss advantages provided by Phentermine. In a 108 week study using Phentermine, the Department of Nutrition Sciences at the University of Alabama at Birmingham confirmed that Phentermine alongside lifestyle changes like diet and exercise is an effective treatment for obesity. These trials found that the users of Phentermine had a much higher rate of sustained weight loss.

The article “The Average Monthly Weight Loss Using Phentermine” by Beth Spicer shows the results from three different tests. Each test was done with different diets and exercise requirements. The results all showed weight loss by their patients with the numbers ranging from three to six LBS a month.

A common question associated with weight-loss drugs is their addiction. In the Medscape article “New Evidence: Obesity Drug Phentermine Is Not Addictive” by Randy Pugh, the fears about withdrawal symptoms and addiction are dispelled. Mr. Pugh quotes a trial research doctor, Dr. Hendricks, as saying “The evidence strongly suggests Phentermine is far safer than is commonly assumed”. Studies show that the only withdrawal symptom of note after discontinuing use of the appetite suppressant Phentermine is an increased appetite.

Phentermine Weight Loss

Side Effects of Phentermine

Phentermine is a drug and therefore has the possibility of having adverse effects. The first step when taking any drug is to take the prescribed dosage, at the prescribed times, and in the correct way. Phentermine should be taken in the morning and 30 minutes before a meal. The reason it is taken 30 minutes before a meal is because food intake will slow the rate of absorption of the medication. Taking Phentermine before the meal will ensure that the maximum absorption and benefits are gained.

Taking Phentermine too late in the day may cause side effects of restlessness and insomnia. Taking Phentermine before breakfast lowers the risk for these side effects.

The full list of possible side effects for Phentermine is provided below but there are a few that may be serious. Some side effects of Phentermine include, but it not limited to, chest pains, a decreased ability to exercise, fainting, swelling of feet or lower legs, and trouble breathing. They are all symptoms to watch out for.

Be sure to contact your doctor immediately if you notice any of these symptoms.


Appetite Suppressant – Phentermine is an appetite suppressing drug approved by the FDA.


  • Tablet
  • Capsule
  • Orally disintegrating tablet


Phentermine is to be taken 30 minutes before a meal.

Therapeutic Effects

  • CNS Stimulation – A drug that can speed up the physical and mental processes of the body. Also helps the body by increasing rates of metabolism.
  • Appetite Suppression – A drug that reduces the craving for food.


Phentermine is recommended for use in individuals with a BMI greater than 27. An 8 to 12 week plan alongside diet and exercise is recommended to promote weight-loss.


  • Hypersensitivity to sympathetic amines; Intolerance, allergic reactions, and undesirable reactions produced by the immune system related to the use of the drug. If you have a known hypersensitivity to sympathetic amines use of Phentermine is not advised.
  • Glaucoma
  • History of hypertension; Current hypertension (AKA High Blood Pressure)
  • Arteriosclerosis
  • Cardiovascular disease
  • Hypothyroidism
  • Schizophrenia
  • History of drug abuse
  • Use of MAO inhibitors within 14 days of use of Phentermine.
  • Pregnancy; Lactation

Cautious Use

  • Mild hypertension (High Blood Pressure)
  • Diabetes mellitus

Patient Education

  • Take Phentermine 30 minutes before eating breakfast. Taking Phentermine at night may cause insomnia.
  • Notify prescriber if tolerance to Phentermine develops after a few weeks. DO NOT increase dosage.
  • Weigh yourself three times a week at the same time wearing the same amount of clothing.
  • Immediately report the following:
    • Shortness of breath
    • Chest pain
    • Dizziness or fainting
    • Swelling or arms or legs

Female DoctorComprehensive List of Side Effects for Phentermine

Body – These effects can appear anywhere in the body.

  • Hypersensitivity (Allergic Reaction)
  • Chest Pain
  • Excessive Sweating
  • Chills
  • Flushing
  • Fever
  • Muscle Pain

Cardiovascular – These effects pertain to the heart and circulation.

  • Heart Palpitations
  • Tachycardia (Fast heart beat)
  • Arrhythmias
  • Hypertension
  • Fainting

Gastrointestinal – These effects are found in the digestive tract which begins at the mouth, goes through the stomach, and ends with the intestines and rectum.

  • Dry Mouth
  • Altered Taste
  • Nausea
  • Vomiting
  • Ab Pain
  • Diarrhea
  • Constipation
  • Stomach Pain

Endocrine – These effects are to the hormone secreting glands within the body.

  • Gynecomastia(Male Breast Formation)

Hematologic – These effects are disorders which affect the blood.

  • Bone Marrow Suppression
  • Leukopenia

Musculoskeletal – These effects impact muscles and bones.

  • Muscle Pain

Central Nervous System – These effects impact the brain, spinal cord, and nerve messages throughout the body.

  • Overstimulation
  • Nervousness
  • Restlessness
  • Dizziness
  • Insomnia
  • Weakness
  • Fatigue
  • Malaise
  • Anxiety
  • Euphoria
  • Drowsiness
  • Depression
  • Agitation
  • Dysphoria
  • Tremor
  • Confusion
  • Headache
  • Change in Libido

Skin – These effects impact the skin.

  • Alopecia
  • Bruising

Eyes – These effects impact the eyes

  • Blurry Vision

Urogenital – These effects impact the reproductive system and urine.

  • Dysuria
  • Polyuria
  • Impotence
  • Menstrual Upset