Skip to content 
Weight Loss Education
Tesofensine: What to Know About This Investigational Weight Loss Medication
Learn how tesofensine works, what research has studied, and the safety questions that matter. Tesofensine should only be used under direct medical care.
Tesofensine is an investigational medication that is not FDA-approved. It affects heart rate, blood pressure, and brain chemistry, and it can interact with other medications. It should only be used under the direct care of a licensed medical provider who can evaluate your health and monitor you. Never buy or take tesofensine on your own.
What Is Tesofensine?
A medication that works on the brain's appetite signals
Tesofensine is an investigational oral medication, not a peptide. It is a triple monoamine reuptake inhibitor, meaning it increases levels of three brain chemicals involved in appetite and reward: serotonin, norepinephrine, and dopamine.
It was originally studied for Parkinson's and Alzheimer's disease, where researchers noticed patients were losing weight. Clinical trials since then have studied it specifically for obesity. It has not completed the approval process in the United States and is not FDA-approved for any use.
- ✓ Taken by mouth, not by injection
- ✓ Works through brain appetite pathways rather than gut hormones
- ✓ Studied in human clinical trials, but not FDA-approved
What Research Has Studied
What clinical research has looked at
Research on tesofensine has focused on appetite and weight. These findings come from clinical trials and do not mean the medication is safe or right for everyone.
Appetite
Studied for reducing hunger so smaller portions feel more satisfying.
Cravings
Acts on brain reward pathways linked to cravings and snacking.
Weight loss
Clinical trials have measured weight loss alongside diet changes.
Fullness
Studied for helping people feel full sooner during meals.
Heart rate effects
Trials found increases in heart rate and, in some people, blood pressure.
Ongoing study
Long-term safety has not been established, and research is still ongoing.
Comparing Options
How tesofensine compares to GLP-1 medications
Tesofensine and GLP-1 medications both target appetite, but they work very differently and have very different levels of research behind them.
Tesofensine
Works in the brain on the chemicals that control appetite and reward.
- ✓ Oral medication
- ✓ Investigational and not FDA-approved
- ✓ Requires close heart rate and blood pressure monitoring
GLP-1 medications
Medications such as compounded semaglutide and tirzepatide mimic gut hormones that signal fullness and slow digestion.
- ✓ Usually a weekly injection
- ✓ Acts on gut and appetite hormone pathways
- ✓ Backed by larger and longer clinical studies
Compounded Semaglutide and Tirzepatide medications are not FDA-approved for safety and efficacy. Individual circumstances and potential risks vary. This content does not guarantee or promise any specific outcome or timeline.
Safety First
Why direct medical care matters
Medications that act on brain chemistry need careful oversight. Here is what a medical provider watches for:
Heart health
Heart rate and blood pressure need to be checked before and throughout use.
Drug interactions
It can interact with antidepressants, stimulants, and other medications.
Mood & sleep
Changes in mood, anxiety, or sleep need to be recognized early.
Long-lasting effects
It clears from the body slowly, so side effects can continue after stopping.
Important Safety Information
Who should be especially cautious
Tesofensine may be unsafe for people who:
- ✓ Have heart disease, high blood pressure, or an irregular heartbeat
- ✓ Have a history of seizures, anxiety, depression, or other mental health conditions
- ✓ Take antidepressants or other medications that affect serotonin or dopamine
- ✓ Are pregnant, breastfeeding, or planning a pregnancy
Under direct medical care only
Talk to a provider first
Tesofensine should only be used under direct medical care. Products sold online as "research chemicals" are not made for human use and may not contain what their labels say. If you are interested in medical weight loss, a licensed provider can help you find a safe, supervised option.
Free Consultation
Talk with a MedShape provider about your weight loss options
Get guidance from a medical provider on supervised weight loss options that fit your health and goals. No pressure, just answers.
Where to find us
Five clinics across Arizona & Minnesota
Prefer to start from home? Our Nationwide Telehealth program brings physician-supervised weight loss care to patients anywhere in the U.S.
Questions
Tesofensine FAQ
What is tesofensine?
Tesofensine is an investigational oral weight loss medication. It works in the brain by increasing serotonin, norepinephrine, and dopamine, chemicals involved in appetite, fullness, and cravings.
Is tesofensine FDA-approved?
No. Tesofensine is an investigational medication and is not FDA-approved for any condition. It has been studied in human clinical trials for weight loss, but its long-term safety and effectiveness have not been established through the FDA approval process.
Is tesofensine a peptide?
No. Unlike BPC-157 or TB-500, tesofensine is a small-molecule medication taken by mouth. It works on brain chemistry rather than acting like a natural protein or hormone.
Why should tesofensine only be used under direct medical care?
Tesofensine affects heart rate, blood pressure, mood, and sleep, and it can interact with other medications. It also stays in the body for a long time. A licensed provider needs to evaluate your health beforehand and monitor you throughout. It should only be used under direct medical care.
What side effects have been reported?
Side effects reported in clinical trials include a faster heart rate, higher blood pressure, dry mouth, trouble sleeping, nausea, constipation, and changes in mood.
Can tesofensine interact with other medications?
Yes. Tesofensine can interact with antidepressants, stimulants, migraine medications, and other drugs that affect serotonin or dopamine. Always tell a medical provider about every medication and supplement you take.
Is it safe to buy tesofensine online?
No. Tesofensine sold online, often labeled as a "research chemical," is not made for human use, is not quality-controlled, and may not contain what the label says. Do not buy or take tesofensine on your own.
How does tesofensine compare to GLP-1 medications?
Both target appetite, but tesofensine works on brain chemistry while GLP-1 medications act on gut and appetite hormones. GLP-1 medications have been studied in larger and longer clinical trials. A medical provider can explain which options may be appropriate for you.
What weight loss options does MedShape offer?
MedShape offers physician-supervised weight loss programs at our Arizona and Minnesota clinics and through telehealth. Book a free consultation or schedule a phone consultation to talk with a provider about your options. Not all programs and medication may be available in each State. Please check with your nearest MedShape Clinic to determine if your State qualifies for a specific program or medication you may be interested in.
Looking for a supervised weight loss plan?
Start with a free consultation. Our team will help you understand your options and build a plan that fits your health and goals.