Diethylpropion is a prescription weight-loss medication and appetite suppressant. It reduces cravings, hunger, and binge eating to help you manage your weight.
Get in to see a weight loss specialist to find out if diethylpropion is right for your weight loss plan in as little as 24 hours on Klarity Health.*
Providers on Klarity Health are independent practitioners with clinical autonomy; a diagnosis, treatment, or prescription is not guaranteed.
Providers on Klarity Health are independent practitioners with clinical autonomy; a diagnosis, treatment, or prescription is not guaranteed.
Diethylpropion hydrochloride is a prescription medication used to treat obesity in adults. Generic diethylpropion hydrochloride extended-release and immediate-release tablets were U.S. Food and Drug Administration (FDA)-approved in 2011 for the management of exogenous (meaning not caused by internal factors) obesity. It’s intended as a short-term aid (a few months) alongside a calorie-restricted diet for people with a body mass index (BMI) of 30 or higher who haven’t had results with diet and/or exercise alone.
The brand name of diethylpropion is Tenuate. It was approved by the FDA in 1959, but has since been discontinued in the U.S. The other brand name for diethylpropion, Tepanil, was FDA-approved in 1982 and was also discontinued.
Diethylpropion can help with short-term weight management by suppressing appetite and reducing food cravings. While FDA-approved for weight loss, it’s not used for cosmetic weight management or overweight cases that aren’t categorized as obesity (a BMI of 30 or more).
Diethylpropion also isn’t meant to be used longer than 12 weeks due to a risk of severe cardiovascular and/or neurological side effects, like chest pain, arrhythmia (irregular heartbeat), elevated blood pressure, pulmonary hypertension (high blood pressure in the lungs), seizure, trouble speaking, or weakness on one side of the body.
Some providers may prescribe diethylpropion off-label, meaning for something it’s not FDA-approved for, to be used for longer than 12 weeks if other weight loss methods aren’t effective.
Diethylpropion is a central nervous system (CNS) stimulant. It acts on the hypothalamus, the part of the brain responsible for regulating appetite and energy balance. It increases levels of 2 neurotransmitters, or chemical messengers, norepinephrine and dopamine. Higher levels of norepinephrine and dopamine are associated with decreased feelings of hunger. More dopamine in the brain can also reduce cravings, emotional eating, and binge eating.
By suppressing appetite, diethylpropion helps people eat less and stick to a calorie-controlled diet, which, when combined with exercise, can lead to weight loss. In a small double-blind, placebo-controlled evaluation of obese adults, 12 people taking diethylpropion and who made diet and exercise changes lost an average of 15.9 pounds in 12 weeks. People taking a placebo lost 10 pounds.
In a 2009 study that exceeded the FDA-approved timeline for using diethylpropion, people lost 9.8% of their initial body weight compared to 3.7% for people on a placebo in the first 6 months. For someone who weighs 250 pounds, that’s a loss of 24.5 pounds using diethylpropion.
Diethylpropion hydrochloride and diethylpropion hydrochloride ER are FDA-approved for adults with exogenous obesity (a BMI of 30 or more) who haven’t been able to reduce their weight through diet and/or exercise.
Diethylpropion can also be prescribed for those with a BMI of 27 or more who have at least 1 weight-related condition, such as type 2 diabetes or high blood pressure (hypertension) and haven’t been able to lose weight through diet and lifestyle changes.
For either group, diethylpropion is only FDA-approved as a short-term weight loss medication to be used with a weight loss program that includes calorie restriction.
To take diethylpropion, you need a prescription from a qualified healthcare provider. Professionals, such as nurse practitioners (NPs), physician associates/assistants (PAs), and medical doctors (MDs), can evaluate your needs and prescribe diethylpropion or other medications for weight management if they’re a medically necessary part of a weight loss treatment plan for you.
On Klarity Health, quickly make an appointment to connect with a licensed healthcare provider online to discuss a tailored weight loss treatment plan, which may or may not include a medication like diethylpropion. Appointments are often available within a day and your prescription can be sent to any pharmacy you choose, either online or local.*
Diethylpropion is available in 2 dosage forms: immediate-release tablets and extended-release tablets. Immediate-release tablets are available in a 25-milligram dosage strength, and extended-release tablets as a 75-milligram strength dose. The extended-release dose lasts 24 hours while the immediate-release dose lasts 6 to 8 hours.
You take immediate-release diethylpropion 3 times daily, 1 hour before eating a meal. If needed, you can also take it in the mid-evening to reduce nighttime hunger. You take extended-release diethylpropion once a day in mid-morning. You want to always swallow the tablet whole.
To minimize unnecessary exposure and risks, treatment with diethylpropion hydrochloride should only be continued if you successfully lose weight in the first 4 weeks of taking it (for example, a weight loss of at least 4 pounds, or as determined by you and your provider).
If you miss a dose, take it as soon as you remember unless it’s close to your next scheduled dose. Don’t take a double dose to make up for a missed dose. Taking too much can cause an overdose that results in restlessness, tremors, hyperreflexia (an exaggerated reflex response), rapid respiration, confusion, a tendency to fight, quarrel or be physically aggressive, hallucinations, panic states, mydriasis (dilated pupils), cardiovascular issues, and gastrointestinal symptoms followed by fatigue and depression.
Common side effects of diethylpropion include increased heart rate, elevated blood pressure, blurred vision, restlessness, unpleasant taste in the mouth, insomnia, nervousness, vomiting, diarrhea, dry mouth, constipation, rash, hair loss, muscle pain, drowsiness, and increased sweating.
More serious side effects, such as chest pain, shortness of breath, elevated blood pressure in the lungs, irregular heartbeat, a decrease in bone marrow, mood changes, seizure, or weakness on one side of the body, are rare but can occur.
Don’t use diethylpropion if you’ve taken a monoamine oxidase inhibitor (MAOI) in the past 14 days or if you have a heart murmur, valvular heart disease, high blood pressure in the lungs, hypertension, or hyperthyroidism (overactive thyroid). And don’t use diethylpropion with other weight-loss medications or if you have taken any in the past 12 months, including prescription drugs, over-the-counter products, or herbal supplements.
Diethylpropion is categorized as a Schedule IV controlled substance by the Drug Enforcement Agency (DEA). The label of Schedule IV means that it has a potential for abuse, misuse, and addiction. Using diethylpropion for a long time may lead to dependence, and stopping it can cause withdrawal symptoms.
If you take diethylpropion and have any side effects, work with your provider and consider reporting negative side effects to the FDA by visiting MedWatch or calling 1-800-FDA-1088.
On drugs.com, with its discount, the cost for 90 25-milligram immediate-release diethylpropion tablets is $24.50 — that’s a 1-month supply. Extended-release 75-milligram tablets cost between $58.14 and $162.50 for 30 tablets with the drugs.com discount — also a 1-month supply.
Diethylpropion often requires prior authorization to be covered by insurance, meaning your doctor must provide information about why you need the treatment to your insurance company. Your insurance company will review the information and only cover diethylpropion for you if they approve your prior authorization.
You may be able to pay less out of pocket for diethylpropion with a prescription drug discount card from GoodRx, SingleCare Rx, NeedyMeds, WellRx, and others and with or without insurance coverage.
Phentermine is similar to diethylpropion. Both are CNS stimulants that suppress appetite by affecting levels of neurotransmitters in the brain. Phentermine is FDA-approved for weight loss over 3 months. In 1 retrospective study, participants lost at least 3% of their starting weight on phentermine in 3 months (12 weeks). In longer studies, people lost up to 5.8% of their starting weight over 6 months on phentermine. Phentermine may produce more pronounced side effects than diethylpropion.
Qysmia (phentermine/topiramate ER) is a combination of phentermine and topiramate, which together can boost metabolism and suppress appetite and may result in similar weight loss to diethylpropion. In clinical trials, participants taking Qsymia lost 5 to 10% of their initial body weight in 56 weeks.
Contrave (naltrexone HCI/bupropion HCI) also works on neurotransmitters to reduce appetite, reduce cravings, and curb emotional eating. It helps rev up metabolism. This FDA-approved weight loss drug resulted in a 5 to 10% weight loss of patients’ starting body weight in about 56 weeks, according to clinical trials.
Other FDA-approved weight-loss prescription drugs can result in better weight-loss results. Wegovy (semaglutide) is an injectable medication that works to regulate appetite by mimicking a natural hormone called glucagon-like peptide-1 (GLP-1) agonist. Studies report that individuals taking semaglutide in Wegovy lost up to 14.9% of their starting body weight in 68 weeks.
A glucagon-like a peptide-1/gastric inhibitory polypeptide (GLP-1/GIP) dual agonist, Zepbound (tirzepatide), makes you feel fuller sooner and decreases appetite, causing you to eat less and lose weight. In a clinical trial, people lost up to 20.9% of their body weight in 72 weeks on Zepbound.
Qysmia, Contrave, phentermine, Wegovy, and Zepbound are FDA-approved for weight loss or weight management in people with obesity and overweight when combined with a reduced-calorie diet and increased physical activity. They’re approved for long-term use. Each medication can have side effects, such as nausea, vomiting, nervousness, diarrhea, constipation, insomnia, headaches, elevated blood pressure, and dry mouth. Phentermine and Qysmia, like diethylpropion, are controlled substances and can increase heart rate or blood pressure and cause dependency and misuse.
To understand all possible side effects, drug interactions, and contraindications for a medication, talk to your pharmacist or provider, and read the medication guide.
The best way to choose the right weight-loss medication for you, if any, is to consult a weight-loss provider. Find one on Klarity Health and access, affordable, patient-centered care with convenient online appointments and free consultations with many providers.
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Providers on Klarity Health are licensed, board-certified, and offer a personalized approach to your unique weight-loss needs. See detailed profiles for each provider and find an approach that’s best for you. (Costs for treatment options may vary.)
Your journey to losing weight starts with an initial consultation Your provider will go over your goals and medical history to recommend a program that’s right for you and may or may not include prescription medication.
Your initial consultation is just the beginning. You and your provider will follow up to make sure you’re doing okay and that you’re reaching your goals. You stay on track with easy medication refills and ongoing support from your provider.
If you have questions or need assistance, the Klarity Health Patient Support team is there to help. Along with your provider, they’re committed to making sure you have the best care and support throughout your weight loss journey.
*Appointments are generally available within 24 hours. Free initial consultations are available only with select providers. Prescriptions, particularly for controlled substances, may require an in-person evaluation depending on the state of residence and current federal regulations.
The information provided in this article is for educational purposes only and should not be construed as medical advice. Controlled substances may not be appropriate for all patients and any mention of these medications is for educational purposes only, not for marketing or encouraging self-diagnosis. Always seek the guidance of a qualified healthcare professional with any questions or concerns you have regarding your health. Providers on Klarity Health are independent practitioners with clinical autonomy. Nothing in this article is intended to diagnose or treat any condition, including guaranteeing prescription medication of any kind or dosage. Not all providers on Klarity Health prescribe all medications, particularly medications that are controlled substances.
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