What is Firdapse?

FIRDAPSE is the first and only FDA-approved, evidence-based treatment for people diagnosed with Lambert-Eaton myasthenic syndrome (LEMS). FIRDAPSE is clinically proven to maintain muscle strength, mobility, and improve a patient’s sense of physical well-being.

How FIRDAPSE works in patients with LEMS

Diagram of ACh and Shoulder Muscle
  1. Our muscles rely on a chemical signal from our nerves called acetylcholine (ACh) to move and function properly.
  2. In patients with LEMS, nerves have a reduced ability to release ACh, so the muscles don’t receive the signal they need to move and function.
Man Getting Up from Chair
  1. As a result, patients with LEMS are left feeling tired and weak.
  2. FIRDAPSE improves the ability of nerves to communicate with muscles by helping to restore the release of ACh.

brochure icon
Educational Brochure

Download an educational brochure about LEMS and how FIRDAPSE may help.

lems icon
Is It LEMS?

Your symptoms may be trying to tell you something. Take a brief assessment survey to get a better picture of what’s really going on, and then share it with your doctor.