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Phentermine Product Information

Oral Phentermine Hydrochloride (HCL) is an appetite suppressant famous for weight loss for the short-term management of exogenous obesity. Phentermine is a safe and effective way to lose weight when it is taken as per directions . It works best when it is taken in conjunction with diet, exercise and behavior therapy.

Phentermine is available in three forms:

  • Tablets
  • Capsules
  • Resin capsules

FDA Approval
Phentermine is a Food and Drug Administration (FDA) approved appetite suppressant for the short-term treatment of obesity

Product Description
Phentermine is an appetite suppressant, which works by stimulating the hypothalamus gland and affecting certain neurotransmitters to decrease appetite. The hypothalamus is the region of the brain that controls the autonomic nervous system, regulating sleep cycles, body temperature, appetite, etc.

Phentermine should be taken on an empty stomach. Take this medicine about 30 minutes to 1 hour before Breakfast. It should be swallowed whole.Avoid taking it late in the day as it may cause sleeplessness. If you have to take a second dose, take it at least 4 to 6 hours before bedtime.

The recommended dose of Phentermine may be different for different patients. If your dose is different, do NOT change it unless your doctor tells you to do so.

Adults under Age 60:

  • Oral dosage form (Capsules) - 15 to 37.5 mg once per day before breakfast or 1-2 hours after breakfast.
  • Oral dosage form (Tablets) - 15 to 37.5 mg once per day before breakfast or 1-2 hours after breakfast. Instead of taking it once a day, your doctor may tell you to take 15 to 37.5 mg in divided doses one-half hour before meals.
  • Oral resin dosage form (Capsules) - 15 to 30 mg once per day before breakfast.

Adults Age 60 and Over:

  • A reduced dosage may be necessary. Consult your physician.

Infants and Children:
Phentermine is NOT recommended for children under age 16.

Missed dose:
If you miss a dose of phentermine, take it as soon as possible. But do not take 2 doses at once. If overdose is suspected, contact your local poison control center or emergency room immediately. Symptoms of overdose may include restlessness, tremor, rapid breathing, confusion, nausea, vomiting, diarrhea, and stomach cramps.


  • Phentermine must be should be kept out of children's reach.
  • It should be stored at room temperature below 77 degrees F (25 degrees C) in a tightly-closed container, away from heat and light.
  • Do NOT store phentermine in the bathroom, near the kitchen sink, or in other damp places. Heat or moisture may cause the medicine to break down.
  • Do NOT keep outdated medicine past the expiration date.

Duration of usage:
Phentermine is meant for short-term use. Continuous use will lead your body to build up a resistance to the effects of this medication after a few weeks of treatment. It is always advised to take help from the pill but not to get addicted to it.

Side Effects
Phentermine may cause unwanted side effects, some being symptoms of serious heart or lung problems. Please consult your doctor immediately if you notice:

  • Chest pain
  • Decreased ability to exercise
  • Fainting
  • Swelling of feet or lower legs
  • Trouble in breathing

Other common symptoms include Depression, Drowsiness , Increased blood pressure, Irritability, Nervousness ,Tiredness , Blurred vision ,Change in sexual desire, Clumsiness ,Confusion ,Diarrhea ,Dizziness ,Dry mouth ,Headache ,Irregular heartbeat, Nausea or vomiting ,Psychosis ,Skin rash or itching ,Stomach pain ,Tiredness and Unpleasant taste.

Please use Phentermine with caution as it is similar chemically to amphetamines and has the potential for psychological dependency.

  • Dosage: Do not exceed the recommended dose or take this medicine for longer than prescribed without checking with your doctor. Exceeding the recommended dose or taking this medicine for longer than prescribed may cause serious side effects.

  • Driving and Hazardous work : Phentermine may cause dizziness or make you less alert than normal .Do not drive or do anything else that could be dangerous until you know how you react to phentermine.
  • Alcohol : Alcohol may increase unwanted side effects of dizziness, therefore, it is advisable to limit alcohol use while taking Phentermine (or other appetite suppressants).
  • Breast Feeding - Use of Phentermine (or other appetite suppressants) while breast-feeding is NOT recommended; it may pass into breast milk, causing unwanted effects in nursing babies. Please consult your doctor for advice.
  • Pregnancy - Phentermine has not been shown to cause birth defects in humans. Prior to taking this medication, tell your doctor if you are pregnant or attempting to become pregnant.

Do not miss any medical appointments while taking the drug and before any medical or dental treatments, emergency care, or surgery, tell the doctor or dentist that you are using phentermine. Do not share this medicine with others for whom it was not prescribed.Do not use phentermine for other health conditions. Keep phentermine out of the reach of children.

Drug Interactions:
When you are taking Phentermine (or other appetite suppressants), it is especially important that you inform your doctor if you are taking any of the following: Amantadine , i.e. - Symmetrel, Amphetamines, Caffeine , i.e. - NoDoz, Chlophedianol , i.e. - Ulone, Cocaine, Medicine for asthma or other breathing problems, Medicine for colds, sinus problems, or hay fever or other allergies (including nose drops or sprays), Methylphenidate , i.e. - Ritalin, Nabilone , i.e. - Cesamet, diet pills or Selective serotonin reuptake inhibitors ( citalopram, i.e. - Celexa, fluoxetine, i.e. - Prozac, fluvoxamine, i.e. - Luvox, paroxetine, i.e. - Paxil, sertraline, i.e. - Zoloft), Pemoline , i.e.- Cyler, Monoamine Oxidase (MAO) inhibitors and Tricyclic antidepressants.

Important NOTE:
Take Phentermine ONLY as directed by your doctor. If too much Phentermine is taken, it may cause unwanted effects or become habit-forming. Do NOT take it for a longer time than your doctor ordered.

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