Phentermine (Adipex)

A Proven and Affordable Option for Weight Loss

Phentermine, also known by the brand name Adipex, is one of the most widely prescribed weight loss medications in the U.S. Since the 1950s, it has been shown to be safe and effective when used under medical supervision. While once considered a short-term option, obesity medicine physicians now often use phentermine long term when appropriate.

At PrecisionMD Wellness and Weight Loss, our providers prescribe phentermine carefully and only when it’s the right fit for you. In Alabama, phentermine prescriptions require monthly in-person visits, and each prescription can cover no more than a 35-day supply. We see patients at our Decatur and Madison clinics for these visits.

How Phentermine Works

Phentermine supports weight loss by reducing hunger signals in the brain. It:

Benefits of Phentermine

Patients using phentermine under medical supervision may experience:

Who Is a Candidate for Phentermine?

Phentermine may be considered if you:

Have a BMI of 30 or higher, even without other health issues
Have a BMI greater than 25 with at least one weight-related condition (such as diabetes, high blood pressure, or PCOS)
Have a body fat percentage ≥25% for men or ≥30% for women
Have an abdominal circumference of at least 40 inches for men or 35 inches for women
Struggle with appetite and cravings that interfere with weight loss
Do not have medical conditions or medications that make stimulant use unsafe
Are able to attend monthly in-person visits for safe prescribing and monitoring

⚠️ Phentermine is a controlled substance. By law in Alabama, it must be prescribed with monthly in-person visits and may only be dispensed in limited supplies.

Frequently Asked Questions

Find quick answers to common questions about our services, products, and policies. This section is designed to help you get the information you need—fast and easy.

How is phentermine different from other weight loss medications?

Phentermine is a stimulant that reduces appetite. It has decades of data showing safety when prescribed with monitoring. Unlike some newer weight loss medications, phentermine is available at a much lower cost.

Can phentermine be prescribed via telemedicine?

No. In Alabama, phentermine requires monthly in-person visits for prescribing and refills.

How long will I take phentermine?

It depends on your health needs and progress. Some patients take it for a defined period, while others continue long term under medical supervision. You’ll still need monthly in-person visits for ongoing prescriptions.

Will I regain weight after stopping phentermine?

Weight regain is possible if healthy habits aren’t continued. At PrecisionMD, we pair phentermine with nutrition, lifestyle coaching, and long-term strategies to help you sustain results whether or not you continue the medication.

Do I have to follow a diet while taking phentermine?

Not in the traditional sense. We don’t require a strict or highly restrictive diet plan. Instead, we encourage balanced eating and healthy habits that support long-term success. Phentermine helps manage appetite, but lasting results come from combining medication with sustainable lifestyle changes.

How much does phentermine cost?

Phentermine is one of the most affordable prescription weight loss medications available. Most patients can fill it at their local pharmacy for $10–$20 per month, depending on the pharmacy and insurance coverage.

How much weight will I lose with phentermine?

Results vary widely. On average, patients taking phentermine under medical supervision lose about 5–10% of their starting body weight over time. Some people may lose more, others less, depending on factors like metabolism, lifestyle, and how consistently they follow their plan. The key is that phentermine works best when paired with balanced nutrition, physical activity, and healthy habits — not as a stand-alone solution.

What are the side effects of phentermine?

Common side effects can include dry mouth, insomnia, constipation, increased heart rate, or jitteriness. These effects are usually mild and often improve as your body adjusts. Because phentermine is a stimulant, it may not be appropriate for people with certain medical conditions or for those taking specific medications. At PrecisionMD, we monitor you closely with monthly in-person visits to make sure the medication remains safe and effective.

Phentermine at PrecisionMD

When you choose PrecisionMD for phentermine treatment, you’ll receive:

A thorough in-person consultation and health screening
A personalized prescription plan, if appropriate
Guidance on safe and effective use
Monthly in-person visits to monitor progress and refill prescriptions
Ongoing support with nutrition, lifestyle, and weight management

Get safe, physician-supervised care with a proven and affordable medication.