Does Fycompa cause weight gain?
Weight gain is a common dose-related side effect of Fycompa (perampanel), a non-competitive AMPA glutamate receptor antagonist used to treat epilepsy. It occurs in about 4 percent of patients treated with an 8 mg or 12 mg dose of the drug. Monitoring for weight gain is recommended while being treated with Fycompa.
In a trial conducted in adults with partial-onset seizures, adults treated with Fycompa for 19 weeks gained more weight compared with adults who received placebo (2.5 lbs [1.1 kg] vs 0.7 lbs [0.3 kg]).
A total of 9.1 and 0.9 percent of Fycompa-treated adults gained at least 7 and 15 percent of their baseline (at the beginning of the study) body weight, respectively. This was more than the 4.5 and 0.2 percent of placebo recipients who gained at least 7 and 15 percent, respectively.
In a separate study conducted in adults and adolescents with primary generalized tonic-clonic seizures, a similar level of weight gain was observed.
Patients with mild-to-moderate intellectual disabilities also gain significantly more body weight while on Fycompa compared with patients with severe intellectual disabilities or no intellectual disabilities who took the drug, according to the results of a clinical study. This was thought to be because Fycompa-induced food intake was greater in patients with mild-to-moderate intellectual disability due to weaker behavioral control. The same body weight gains were not observed in patients with severe intellectual disability, which was likely due to their food intake being controlled by a caregiver.
References
- Food and Drug Administration (FDA). Fycompa Product Label. [Accessed 23 November, 2022]. Available at: https://www.accessdata.fda.gov/drugsatfda_docs/label/2019/202834s016,208277s004lbl.pdf.
- Iwaki H, Jin K, Sugawara N, Nakasato N, Kaneko S. Perampanel-induced weight gain depends on level of intellectual disability and its serum concentration. Epilepsy Res. 2019;152:1-6. doi:10.1016/j.eplepsyres.2019.02.011.
Read next
Related medical questions
- What are 4 key Ozempic side effects to watch out for?
- Mounjaro vs Ozempic: How do they compare?
- How do Ozempic, Mounjaro, Wegovy, Zepbound compare for weight loss?
- Ozempic vs Wegovy: What's the difference between them?
- How long until I lose weight on Wegovy?
- Does Wellbutrin XL/SR cause weight gain or loss?
- Tirzepatide vs semaglutide: How do they compare?
- What happens when you stop taking Ozempic?
- Why does Lexapro cause weight gain?
- Can you get tirzepatide from a compounding pharmacy?
- How does Ozempic (semaglutide) help with weight loss?
- Do Ozempic, Wegovy, Mounjaro & Zepbound cause hair loss?
- Is Mounjaro covered by insurance or Medicare?
- Mounjaro for weight loss, does it work? How much will I lose?
- Does Zoloft (sertraline) cause weight gain?
- Will my insurance cover Ozempic?
- Does Prozac cause weight gain or loss?
- Why am I not losing weight on Saxenda?
- How does semaglutide work for weight loss?
- Why am I not losing weight on Ozempic?
- How do you get Wegovy covered by insurance?
- How does Ozempic affect blood pressure?
- Does Cymbalta cause weight gain?
- Does Jardiance cause weight loss?
- How long can you stay on Ozempic?
- Does Abilify cause weight gain?
- How much weight can I lose on Zepbound?
- What foods should I avoid while taking Contrave?
- Does taking Ozempic affect your face?
- Why does Ozempic cause a dry mouth or taste changes?
Drug information
- Fycompa Information for Consumers
- Fycompa prescribing info & package insert (for Health Professionals)
- Side Effects of Fycompa (detailed)
Related support groups
- Fycompa (3 questions, 10 members)
- Weight Loss (Obesity/Overweight) (750 questions, 1,480 members)