Phentermine 25 mg

Overview

Phentermine is a prescription sympathomimetic medication that may be used
as a short-term adjunct to a reduced-calorie diet and increased physical
activity for weight management in certain adults with obesity or
overweight accompanied by weight-related health risks.

It works primarily by reducing appetite through effects on the central
nervous system. Phentermine is intended to be used as part of a
comprehensive weight-management program, not as a substitute for
appropriate nutrition, physical activity, or medical care.

Phentermine has potential risks, including cardiovascular effects,
misuse, and dependence. It should be used only under the supervision
of a qualified healthcare professional.

Learn more about
weight management and
prescription medication safety.

Uses

Phentermine may be prescribed for short-term weight management in
appropriately selected patients when lifestyle measures alone have
not provided adequate results.

The appropriate use and duration depend on the specific product,
the patient’s medical history, and the prescribing healthcare
professional’s assessment.

Dosage and Administration

The appropriate dose depends on the specific formulation, medical
history, response to treatment, and other medications being taken.

Take phentermine exactly as prescribed. Do not increase the dose or
take it more frequently to try to achieve faster weight-loss results.

Follow the official instructions for the specific product because
different formulations may have different dosing requirements.
The 25 mg strength should be used only when specifically prescribed.

Common Side Effects

Possible side effects include:

• Dry mouth
• Increased heart rate
• Increased blood pressure
• Nervousness or restlessness
• Difficulty sleeping
• Headache
• Dizziness
• Tremor
• Gastrointestinal discomfort
• Constipation

Use caution when driving or operating machinery if you experience
dizziness or changes in alertness.

See our
medication side effects information
for additional educational resources.

Serious Side Effects

Seek urgent medical attention for symptoms such as:

• Chest pain
• Shortness of breath
• Fainting
• Rapid or irregular heartbeat
• Severe or persistent headache
• Severe agitation or confusion
• Signs of a serious allergic reaction

Rare but serious cardiovascular or pulmonary complications can occur.
Do not ignore new or worsening symptoms.

Warnings and Precautions

Phentermine may not be appropriate for people with certain
cardiovascular conditions, uncontrolled high blood pressure,
hyperthyroidism, glaucoma, or a history of certain substance-use
disorders.

Tell your healthcare professional about your medical conditions,
allergies, and all medications before starting treatment.
Phentermine has potential for misuse and dependence and must not
be shared with another person.

Review our
prescription medication safety
information for additional guidance.

Drug Interactions

Tell your healthcare professional about all prescription medicines,
over-the-counter medicines, supplements, and other substances you use.

Important interactions and precautions may involve:

• Monoamine oxidase inhibitors (MAOIs)
• Other stimulant medications
• Certain antidepressants
• Other weight-loss medicines
• Medicines that affect blood pressure or heart rate

Do not combine phentermine with another weight-loss medication or
stimulant unless specifically directed by a healthcare professional.

Learn more about
drug interactions.

Pregnancy and Breastfeeding

Phentermine should not be used for routine weight loss during pregnancy.
Weight loss offers no benefit during pregnancy and may harm the fetus.

Tell your healthcare professional if you are pregnant, planning to
become pregnant, or breastfeeding before using phentermine.

See our
medication safety during pregnancy
information.

Dependence and Misuse

Phentermine is a stimulant medication with potential for misuse and
dependence. Taking more than prescribed or using it for longer than
recommended can increase these risks.

Take the medication only as directed and never share your prescription.
Discuss concerns about side effects or stopping treatment with your
healthcare professional.

Overdose

An excessive amount of phentermine can cause severe agitation,
confusion, tremors, rapid heartbeat, high blood pressure, abnormal
heart rhythms, seizures, or loss of consciousness.

If an overdose is suspected, seek emergency medical assistance or
contact your local poison-control service immediately.

Read our
overdose prevention information.

Storage and Disposal

Store phentermine securely and out of reach of children and anyone
for whom it was not prescribed. Do not share prescription medication.
Follow local pharmacy or healthcare-authority recommendations for
disposing of unused medication.

Important Safety Information

Phentermine should be used only under appropriate medical supervision
and exactly as prescribed. It is intended to support a broader
weight-management program rather than provide a standalone solution
for weight loss.

Do not increase the dose because weight loss appears slow, and do not
combine phentermine with other stimulants or weight-loss medicines
without medical advice.

Additional Medical Resources

• 
  MedlinePlus: Phentermine Medication Information
  
• 
  DailyMed: Phentermine Product Labeling
  
• 
  National Institute of Diabetes and Digestive and Kidney Diseases:
  Weight Management Information
  

---

Medical Disclaimer:
This information is for educational purposes only and does not replace
official product labeling or advice from a qualified healthcare
professional.