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Phentermine

Formula Drugs

Where is Phentermine used?

Phentermine is a prescription medicine used with a doctor-approved behavior changed, exercise, and reduced-calorie diet program for weight loss. This prescription is FDA-approved for use in people who has weight-related medical problems or mainly who are obese. Losing weight helps reduce several health risks that come with obesity such as:

  • High blood pressure
  • Diabetes
  • Heart disease

How does Phentermine work?

Phentermine is an appetite suppressant and in the class of medications known as sympathomimetic amines. It is not clear and known how this drug works in weight loss. It is thought to work by lessening your appetite, increasing the amount of energy that is used by the body, and affecting certain parts of the brain. As an appetite suppressant, it works on certain neurotransmitters in your brain. These neurotransmitters are elevated in levels to make you feel full and therefore eat less.  

How is Phentermine taken?

Before taking this medication, let your doctor know if you are allergic to it, or if you have:

  • A history of drug abuse
  • A history of heart disease (heart rhythm problems, coronary artery disease, congestive heart failure, or stroke)
  • Severe or uncontrolled high blood pressure
  • Glaucoma
  • Overactive thyroid
  • Extreme agitation or nervousness
  • If you take other diet pills

It is recommended to take the lowest dosage of this medication if taking it for the first time. Taking this medication in a high dose has a high risk of potential side effects. The dose must allow you to successfully lose weight. Follow carefully the instructions given by your healthcare provider or doctor.

Each dose of this medicine can be taken 30 minutes to 2 hours before a meal. The dosage and how often you take the drug are based on your medical condition and overall health. This prescription must be taken according to the given instructions by your doctor. Do not change your dose. Doing so may not be effective on your weight loss and might develop certain complications.

What are the precautions in taking Phentermine?

  • Weight loss throughout pregnancy may harm an unborn baby, although you are overweight. Do not take a dose of this medication if you are pregnant. Inform your doctor right away if you become pregnant during treatment with this medication.
  •  This prescription is not recommended for use in children 16 years of age and younger.
  • Older adults should not take this medicine. This is not as safe as other medicines that can be used to treat the same condition.
  • Let your doctor know about all your current medications and any prescriptions you start or stop using. This includes over-the-counter and prescription medicines, herbal products, and vitamins. 
  • Call your doctor right away if you think this medication is not functioning properly, or within 4 weeks you have not lost at least 4 pounds.
  • This medication is not recommended for use if in the past 14 days you have taken an MAO inhibitor. A dangerous drug interaction might happen. MAO inhibitors might include Rasagiline, Linezolid, Tranylcypromine, Phenelzine, Isocarboxazid, and Methylene blue injection.