GTP-004 is a proposed fixed-dose combination tablet for the treatment of the muscle weakness associated with myasthenia gravis. GTP-004 combines pyridostigmine with an antagonist of the gastrointestinal, or GI, side effects of pyridostigmine.

Myasthenia gravis is a chronic autoimmune disease of the neuromuscular junction characterized by muscle weakness. The disease occurs in all ethnic groups and both genders. The prevalence of the disease in the United States is estimated at 14 to 20 per 100,000 population, approximately 36,000 to 60,000 cases in the U.S. (Howard, 2015). Myasthenia gravis most commonly affects adult women (onset between 20 to 40 years) and older men (onset over 60), but it can occur at any age (Myasthenia Gravis Fact Sheet; National Institute of Neurological Disorders and Stroke, 2016).