Impact-Site-Verification: 2721d812-1059-4270-b9fa-5c1654788cd1

Phentermine Hcl Tablet — prescription drug image

Phentermine Hcl

Phentermine HCl 37.5MG

Prescription weight loss

Weight-loss medication, prescribed online

$146/mo vs. brand-name GLP-1 medications $1,300+/mo Save up to 88%

Licensed U.S. providers · No insurance needed · Shipped to your door

See if I qualify Free online visit · No commitment
Compounded GLP-1 medications are not FDA-approved and are prepared by state-licensed compounding pharmacies. They are not affiliated with, endorsed by, or equivalent to any brand-name medication or manufacturer. Prescription required; eligibility is determined by a licensed provider. Prices are estimates and may vary.

What is Phentermine Hcl?

Phentermine (Adipex-P) is a prescription appetite suppressant used for the short-term treatment of obesity in adults. When combined with a reduced-calorie diet, regular exercise, and lifestyle changes, phentermine can help reduce hunger and support meaningful weight loss under medical supervision.

Prescription savings · · · ·

What is Phentermine Hcl ?

Phentermine (Adipex-P) is a prescription appetite suppressant used for the short-term treatment of obesity in adults. When combined with a reduced-calorie diet, regular exercise, and lifestyle changes, phentermine can help reduce hunger and support meaningful weight loss under medical supervision.

  • Allergic reaction: Itching or hives, swelling in your face or hands, swelling or tingling in your mouth or throat, chest tightness, trouble breathing
  • Chest pain, fainting, trouble breathing
  • Fast, slow, pounding, or uneven heartbeat
  • Seizures or tremors
  • Severe headache
  • Swelling of your feet or lower legs
  • Your doctor will do lab tests at regular visits to check on the effects of this medicine. Keep all appointments.
  • It is not safe to take this medicine during pregnancy. It could harm an unborn baby. Tell your doctor right away if you become pregnant.
  • Tell your doctor if you are breastfeeding, or if you have kidney disease, diabetes, or high blood pressure. Tell your doctor if have allergies to aspirin or tartrazine.
  • This medicine may cause the following problems:Primary pulmonary hypertension (a serious lung problem)Heart or blood vessel problem, including valvular heart diseaseChanges in blood sugar levels
  • This medicine may make you dizzy or drowsy. Do not drive or do anything else that could be dangerous until you know how this medicine affects you.
  • This medicine can be habit-forming. Do not use more than your prescribed dose. Call your doctor if you think your medicine is not working.
  • Do not stop using this medicine suddenly. Your doctor will need to slowly decrease your dose before you stop it completely.
  • Keep all medicine out of the reach of children. Never share your medicine with anyone.
Is phentermine a controlled substance?
Yes. Phentermine is a Schedule IV (C-IV) controlled substance in the United States. It is chemically and pharmacologically related to amphetamines and carries a potential for abuse and dependence, which is why it requires a prescription and is regulated more tightly than many other medications.
How much weight can you lose on phentermine in a month?
There is no set amount, and results vary widely from person to person. Phentermine is FDA-approved only as a short-term addition to a full weight-reduction plan that includes exercise, behavior changes, and a reduced-calorie diet, so any weight change depends heavily on those lifestyle factors. If it does not produce an adequate response, it should be discontinued. Talk with your provider about realistic goals for your situation.
What are the most common side effects of phentermine?
Common side effects include difficulty sleeping (insomnia), dry mouth, restlessness, palpitations or a racing heartbeat, constipation, and elevated blood pressure. Because phentermine can raise blood pressure and heart rate, your provider may monitor these. Contact your doctor if side effects are severe or persistent.
How long can you safely take phentermine?
Phentermine is FDA-approved for short-term use, described as a few weeks, as part of a weight-reduction plan. Longer-term use is common in practice but is off-label and should only be done under a provider's supervision, in part because of the potential for tolerance, dependence, and rare but serious risks such as pulmonary hypertension and heart valve problems with prolonged use. Your prescriber will decide what is appropriate for you.
What is the difference between phentermine, Adipex-P, and Lomaira?
They all contain the same active ingredient, phentermine hydrochloride. Phentermine is the generic name, while Adipex-P and Lomaira are brand-name versions. Lomaira is a lower-dose formulation designed to be taken up to three times a day, whereas Adipex-P is a standard once-daily strength. Because they share the same active ingredient, the generic is typically the least expensive option; compare prices for each on Rx.com.
How much does Phentermine cost without insurance?
The price of Phentermine without insurance varies by pharmacy, dosage, and quantity. Rx.com compares cash prices at more than 60,000 US pharmacies so you can find the lowest price near you. Many people save 60–90% off retail prices with a free Rx.com coupon.
What are the common side effects of Phentermine?
Common side effects of Phentermine may include: Allergic reaction: Itching or hives, swelling in your face or hands, swelling or tingling in your mouth or throat, chest tightness, trouble breathing, Chest pain, fainting, trouble breathing, Fast, slow, pounding, or uneven heartbeat, Seizures or tremors, Severe headache. This is not a complete list — consult your pharmacist or doctor for full side effect information.
Is there a generic version of Phentermine?
Generic versions may be available for Phentermine. Generics contain the same active ingredients as brand-name drugs and are typically 80–90% cheaper. Search Phentermine HCl 37.5MG on Rx.com to compare generic and brand prices at pharmacies near you.
What is the cheapest pharmacy for Phentermine?
The cheapest pharmacy for Phentermine depends on your location and dosage. Rx.com compares prices at CVS, Walgreens, Walmart, Kroger, Costco, and thousands of independent pharmacies. Enter your ZIP code on Rx.com to find the lowest price for Phentermine HCl 37.5MG near you.

Phentermine Hcl Coupons & Prices

Phentermine HCl 37.5MG

Prescription weight loss

Weight-loss medication, prescribed online

$146/mo vs. brand-name GLP-1 medications $1,300+/mo Save up to 88%

Licensed U.S. providers · No insurance needed · Shipped to your door

See if I qualify Free online visit · No commitment
Compounded GLP-1 medications are not FDA-approved and are prepared by state-licensed compounding pharmacies. They are not affiliated with, endorsed by, or equivalent to any brand-name medication or manufacturer. Prescription required; eligibility is determined by a licensed provider. Prices are estimates and may vary.
Phentermine Hcl Tablet — prescription drug image
Prescription
Phentermine Hcl 37.5mg (15)
your area ·
Prescription weight loss

Weight-loss medication, prescribed online

Licensed U.S. providers · No insurance needed · Shipped to your door

$146/mo vs. brand-name GLP-1 medications $1,300+/mo Save up to 88%
See if I qualify Free online visit · No commitment
Compounded GLP-1 medications are not FDA-approved and are prepared by state-licensed compounding pharmacies. They are not affiliated with, endorsed by, or equivalent to any brand-name medication or manufacturer. Prescription required; eligibility is determined by a licensed provider. Prices are estimates and may vary.

Looking for a phentermine HCl coupon? Phentermine hydrochloride is the low-cost generic form of the brand-name appetite suppressants Adipex-P and Lomaira, and because it is a widely stocked generic the cash price is already far lower than the brand. The catch is that the price can vary a lot from one pharmacy to the next, so comparing pharmacies is the single best way to pay less. Rx.com checks live prices across more than 60,000 pharmacies so you can see today's cost near you and bring a free discount coupon to the counter. Enter your ZIP above to see today's price.

What is phentermine HCl and how does it work?

Phentermine hydrochloride is a sympathomimetic amine, a type of appetite suppressant that is chemically and pharmacologically related to amphetamines. It works on the central nervous system to reduce hunger, which can make it easier to eat less. It is FDA-approved for short-term use (a few weeks) as one part of a broader weight-reduction plan that also includes exercise, behavior changes, and a reduced-calorie diet. It is intended for the management of obesity in patients with a starting BMI of 30 or higher, or 27 or higher when other risk factors such as controlled high blood pressure, diabetes, or high cholesterol are present.

Phentermine is a generic medication sold under the brand names Adipex-P and Lomaira. It is also very commonly combined with topiramate; the fixed-dose combination is sold as Qsymia (see also phentermine-topiramate).

Phentermine HCl cost and coupons without insurance

Phentermine is available as a generic, and generics are almost always much cheaper than their brand-name equivalents. Even so, the cash price for phentermine is not the same everywhere. Two pharmacies in the same town can charge noticeably different amounts for the identical medication, which is exactly why comparing before you fill matters. If you are paying without insurance, a free Rx.com discount coupon can often lower the cash price below what you would otherwise be charged at the register.

Rx.com does not set or guarantee a fixed price. Instead, we pull live prices from more than 60,000 pharmacies so you can compare the real cost near you right now. Enter your ZIP above to see today's price at pharmacies in your area, then show the coupon at checkout. Because phentermine is a controlled substance, availability and stock can differ by pharmacy, so it is worth checking a few.

Phentermine alternatives and related weight-loss options

Phentermine is one of several prescription options used in weight management, and the right choice depends on your health history and what your provider recommends. Brand versions of phentermine itself include Adipex-P and the lower-dose Lomaira. Phentermine is also combined with topiramate in the branded product Qsymia.

Other prescription weight-management medicines work in different ways. These include Contrave (naltrexone-bupropion), Wegovy (a once-weekly injectable), and diethylpropion, another appetite suppressant in the same general family as phentermine. Your prescriber can help you weigh the options; whichever you and your provider choose, you can compare cash prices and coupons for it on Rx.com.

Important safety information

Phentermine is a Schedule IV controlled substance and, because it is related to amphetamines, it carries a potential for abuse and dependence. It can raise blood pressure and heart rate. It should not be used by people with cardiovascular disease (including coronary artery disease, arrhythmias, uncontrolled high blood pressure, heart failure, or a history of stroke), hyperthyroidism, glaucoma, agitated states, or a history of drug abuse. It should not be taken during or within 14 days of an MAO inhibitor, or during pregnancy or breastfeeding. Common side effects include trouble sleeping, dry mouth, restlessness, a racing heartbeat, and constipation.

There is a rare but serious risk of primary pulmonary hypertension and heart valve problems, particularly with prolonged use or when phentermine is combined with other weight-loss drugs (the historical "fen-phen" concern). Do not combine phentermine with other stimulant-type or weight-loss medicines. Tolerance can develop over time, and it should be stopped if it is not working. This is general information, not medical advice; talk with your doctor or pharmacist about whether phentermine is right for you.

Sources & accuracy

This Phentermine Hcl information was written and reviewed against authoritative U.S. medical sources — MedlinePlus (U.S. National Library of Medicine), DailyMed, and FDA prescribing information — and checked for accuracy. It is provided for education and is not a substitute for professional medical advice.

Verify the official label: Phentermine Hcl on DailyMed (FDA)

Reviewed against FDA labeling · Last reviewed July 2026

¿Buscando esta página en español?

Related Drugs

Browse more medications: starting with P · full A-Z directory · by condition · common drugs

Medical disclaimer: This information is provided for general educational purposes only and is not medical advice. It is not a substitute for professional diagnosis or treatment. Always consult a licensed physician, pharmacist, or other qualified healthcare provider before starting, stopping, or changing any medication or treatment. Never disregard professional medical advice or delay seeking it because of something you read here. If you think you may have a medical emergency, call your doctor or 911 immediately.


Don't Miss Out On Savings!

Rx.com does not warrant the accuracy of the information on this website. All information on this site is intended to supplement, not substitute for, the expertise and judgment of your physician, pharmacist or other healthcare professional. It should not be construed to indicate that use of a drug is safe, appropriate, or effective for you. Consult your healthcare professional before using any drug. All logos, brand names and trademarks on this website are the property of their respective owners. Rx.com is not endorsed or affiliated with any brands represented on this website."

Pharmacy discounts are Not Insurance, and are Not Intended as a Substitute for Insurance THE DISCOUNT IS ONLY AVAILABLE AT PARTICIPATING PHARMACIES As an Amazon Associate, we earn from qualifying purchases.

2026 All Rights Reserved | Rx.com®