Phentermine is an FDA-approved prescription medication used to suppress appetite and enhance energy. It’s one of the most widely prescribed short-term treatments for obesity and is often used to jumpstart weight loss in medically supervised programs.
Phentermine works by stimulating the central nervous system to increase norepinephrine and dopamine activity—leading to reduced hunger, increased alertness, and improved focus. It is generally prescribed in low-to-moderate doses for a short duration (typically 8–12 weeks).
Your provider may prescribe phentermine alone or combine it with other medications such as naltrexone, metformin, or GLP-1s for enhanced, longer-term results.
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✅ Adults with a BMI ≥30, or ≥27 with conditions like PCOS, insulin resistance, or prediabetes
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✅ Patients seeking medically managed weight loss with ongoing support
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Patients who take phentermine as part of a medical weight loss program typically experience:
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Yes. Phentermine is FDA-approved as a short-term appetite suppressant to assist with weight loss in adults with a BMI ≥30 or ≥27 with a related condition.
Phentermine stimulates the release of norepinephrine and dopamine, which decreases hunger signals in the brain and increases alertness and motivation.
Yes, phentermine is a mild sympathomimetic stimulant, similar to amphetamines. It is classified as a Schedule IV controlled substance and must be prescribed and monitored by a licensed provider.
Phentermine is ideal for patients who:
Many patients notice a significant decrease in appetite within the first few days. Weight loss typically starts in the first week and continues steadily for several weeks.
It is generally prescribed for up to 12 weeks at a time. In some cases, your provider may recommend a second cycle or use it intermittently alongside other medications.
Common side effects may include:
Yes. Many providers combine phentermine with topiramate, naltrexone, or GLP-1 medications to target multiple appetite and metabolic pathways. Your provider will customize the safest plan for your goals.
Phentermine is an FDA-approved prescription medication indicated for the short-term treatment of obesity. It is typically prescribed for patients with a BMI ≥30, or ≥27 with weight-related health risks, such as hypertension, high cholesterol, or type 2 diabetes.
Phentermine is a Schedule IV controlled substance and may carry a risk of psychological dependence or misuse if not properly managed. It is not recommended for patients with a history of heart disease, uncontrolled hypertension, hyperthyroidism, glaucoma, or substance use disorder.
Phentermine should not be used in the following cases:
Common side effects include dry mouth, insomnia, jitteriness, constipation, or elevated heart rate. These are usually dose-dependent and reversible with medication adjustment or discontinuation.
Phentermine is not meant for long-term use as a standalone therapy but can be highly effective when integrated into a structured weight loss program that includes nutrition, movement, and medical supervision.
Always follow your provider’s instructions. Never share this medication or adjust your dose without medical guidance. Review the full Medication Guide for more details.
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