Does Ajovy cause weight gain?
Overview
Weight gain has not been reported as a side effect of Ajovy in clinical studies conducted by the manufacturer. Some anecdotal reports from patients and doctors do describe weight gain as a side effect with CGRP inhibitors.
People with migraine headaches may experience weight gain or weight loss for a variety of reasons linked to the migraine condition itself. Migraine pain can be associated with nausea, vomiting and fatigue. Patients may lose their appetite, avoid physical activity, or have irregular eating patterns due to these symptoms.
Obesity itself is linked with migraine and is thought to increase the risk of developing migraines. As obesity increases, so does the risk and severity of migraine headaches.
A variety of other medications used for migraine, such as tricyclic antidepressants, anti-seizure drugs and beta-blockers have been associated with weight gain.
How is Ajovy used in migraine?
Ajovy is used to help prevent migraine headache attacks in adults 18 years of age and older. It also used to prevent episodic migraine in children and adolescents who are 6 to 17 years of age and who weigh 45 kilograms (99 pounds) or more. It is not used to treat an acute migraine headache.
Ajovy (fremanezumab-vfrm) is a monoclonal antibody in the class of medicines known as calcitonin gene-related peptide (CGRP) inhibitors. It helps to prevent migraine headaches by binding to the CGRP ligand to prevent receptor binding. It is given as a subcutaneous (under the skin) injection in the abdomen, thigh, or upper arm.
It is given as a monthly injection on adults and children or as a quarterly (every 3 months) injections in adults.
Ajovy is manufactured by Teva Pharmaceuticals. A generic option is not yet available.
Which migraine drugs cause weight gain?
In clinical studies submitted to the FDA for approval of CGRP inhibitors, weight gain was not listed as a possible side effect and does not appear in product labels. Some anecdotal reports and surveys have suggested patients may see weight gain with CGRPs, especially Emgality (galcanezumab), but this may be due to other factors.
To learn more read Does Emgality cause weight gain?
Other FDA-approved CGRP inhibitors for migraine prevention include:
- Aimovig (erenumab-aooe) from Amgen - the first approved CGRP inhibitor; used for the prevention of migraine in adults.
- Emgality (galcanezumab) from Eli Lilly - used to prevent migraine in adults. Emgality is also approved to treat cluster headache episodes in adults.
- Vyepti (eptinezumab) from Lundbeck - indicated for the prevention of migraine in adults.
Qulipta (atogepant) is an oral CGRP receptor antagonist ("gepant") taken by mouth and is approved to help prevent migraines in adults. It has been associated with weight loss (not weight gain) in clinical studies. The proportion of patients who lost at least 7% of their weight at any point in studies was 2.5% for placebo (a pill with no medicine), 3.8% for Qulipta 10 mg, 3.2% for Qulipta 30 mg, and 5.3% for Qulipta 60 mg.
For an overview, read Does Qulipta cause weight loss?
Related questions
- What are the newest migraine medications in 2025?
- Ajovy vs Aimovig: What's the difference between them?
- How long does it take for Ajovy to start working?
Do older medicines use for migraine cause weight gain?
Older medications used for migraine prevention (but originally were approved for other uses like high blood pressure, depression or seizures) are well-known to be linked with weight gain.
- For example, tricyclic antidepressants used to prevent migraine headache, like amitriptyline and doxepin, are also associated with weight gain.
- Duloxetine (Cymbalta), a serotonin and norepinephrine reuptake inhibitor (SNRI) antidepressant used off-label for migraine prevention, may lead to weight loss or less frequently weight gain.
- Medicines for heart conditions and high blood pressure, such as verapamil and beta blockers like metoprolol (Lopressor) or propranolol are also linked with weight gain.
- Valproate or gabapentin, medicines approved for epilepsy but also used for migraine prevention, may be associated with weight gain.
- Other anti-seizure medications used for migraine prevention may actually lead to weight loss and include topiramate, zonisamide and protriptyline.
Life-style modification can help to improve your headache status, and may include a plan of weight loss and increased activity. Work with your doctor to adjust your diet and lifestyle to encourage weight loss and greater activity, if needed. Always contact your healthcare provider for any side effects that concern you.
Key Takeaways
Weight gain has not been reported as a side effect in clinical studies with Ajovy, a medicine used for migraine prevention. Some anecdotal reports from the public do suggest CGRP inhibitors may cause weight gain.
Other factors related to migraine, such as lack of activity due to chronic headache pain or altered eating habits may play a role in weight gain.
Older medicines from different drug groups, such as amitriptyline, verapamil or valproate, can be linked with weight gain. Talk to your doctor about weight gain with migraine medicines if this is a concern for you.
This is not all the information you need to know about Ajovy for safe and effective use and does not replace your doctor's directions. Review the full product information and discuss this information and any questions you have with your doctor or other health care provider.
References
- Bigal ME, Tsang A, Loder E, et al. Body mass index and episodic headaches: a population-based study. Arch Intern Med. 2007;167(18):1964. https://jamanetwork.com/journals/jamainternalmedicine/fullarticle/413192
- Ajovy (fremanezumab-vfrm) [Product Label]. Teva Pharmaceuticals. North Wales, PA. 8/2025. Accessed Aug 13, 2025. https://www.ajovyhcp.com/globalassets/ajovyhcp/ajovy-pi.pdf
- Bigal ME, Lipton RB. Obesity is a risk factor for transformed migraine but not chronic tension-type headache. Neurology. 2006 Jul 25;67(2):252-7. doi: 10.1212/01.wnl.0000225052.35019.f9
- Kisler L, Weissman-Fogel I, Coghill R, et al. Duloxetine is effective in prevention of episodic migraine: a placebo controlled double blind exploratory study. Presented at: the World Congress on Pain 2018; September 12-16; Boston, MA. Poster 64161
- Nearly 80% of People Taking New Migraine Prevention Drugs Report Improvement. Pain News Network. Accessed Aug 13, 2025 at https://www.painnewsnetwork.org/stories/tag/Emgality
- Robbins L. CGRP Questions/Answers. Robbins Headache Clinic. http://chicagoheadacheclinic.com/cgrp-questions-answers/
Read next
Ajovy vs Emgality: How do they compare?
Ajovy (fremanezumab-vfrm) and Emgality (galcanezumab-gnlm) are two CGRP inhibitors used to prevent migraine headaches in adults. Emaglity may also be used to treat episodic cluster headaches in adults.
Continue reading
How does Ajovy work for migraines?
Ajovy works to help prevent migraine pain by binding to the calcitonin gene-related peptide (CGRP) ligand to prevent its binding to the receptor. Ajovy is in the class of medicines known as calcitonin gene-related peptide (CGRP) inhibitors. It is not used to treat an ongoing migraine headache.
Continue reading
How to use the Ajovy autoinjector?
The Ajovy autoinjector is given as a subcutaneous injection (under the skin). You can learn to give yourself this injection to help prevent migraine headaches. Your healthcare provider can show you how to prepare and inject your dose of Ajovy before the first dose. Use Ajovy exactly as your doctor or other healthcare provider tells you how to use it.
Continue readingSee also:
Related medical questions
- What is the cost of the migraine drug Ajovy?
- What type of drug is Ajovy?
- How do you use the migraine drug Ajovy?
- Is obesity a major risk factor for Covid-19?
- What is the natural Mounjaro recipe for weight loss?
- Mounjaro vs Ozempic: Which is right for you?
- Zepbound vs. Mounjaro: Comparison Guide for Weight Loss and Diabetes Treatment
- Ozempic Side Effects to Watch For
- Why am I not losing weight on Mounjaro?
- Ozempic Mounjaro Wegovy & Zepbound: Weight Loss Compared
- Wegovy vs Ozempic: Which is Right for You?
- How long does it take for Ozempic to work?
- How long until I'll lose weight with Wegovy?
- Does levothyroxine cause weight gain or loss?
- Do Ozempic, Wegovy, Mounjaro & Zepbound cause hair loss?
- Tirzepatide vs semaglutide: How do they compare?
- How does Ozempic work for weight loss?
- Does Wellbutrin XL/SR cause weight gain or loss?
- Which GLP-1 drug is best for weight loss?
- Why does Lexapro cause weight gain? Complete Patient Guide
- Does Ozempic need to be refrigerated?
- Does Lyrica (pregabalin) cause weight gain?
- What happens when you stop taking Ozempic?
- How much is Zepbound with or without insurance?
- Does gabapentin cause weight gain?
- Does Zoloft (sertraline) cause weight gain?
- Will my insurance cover the cost of Ozempic?
- How long does it take for Zepbound to work?
- Saxenda vs Ozempic: For Weight Loss?
- How does Mounjaro Work for Weight Loss?
Drug information
- Ajovy Information for Consumers
- Ajovy prescribing info & package insert (for Health Professionals)
- Side Effects of Ajovy (detailed)
- Ajovy user reviews (347)
Related support groups
- Ajovy (14 questions, 23 members)
- Weight Loss (Obesity/Overweight) (872 questions, 1,513 members)