The U.S. Food and Drug Administration has approved Pretomanid Tablets in combination with bedaquiline and linezolid for the treatment of a specific type of highly treatment-resistant tuberculosis (TB) of the lungs.
“The threat of antimicrobial-resistant infections is a key challenge we face as a public health agency,” said FDA Principal Deputy Commissioner Amy Abernethy, M.D., Ph.D. “The bacterium that causes tuberculosis can develop resistance to the antibiotics used to treat it. Multidrug-resistant TB and extensively drug-resistant TB are public health threats due to limited treatment options. New treatments are important to meet patient national and global health needs. That’s why, among our other efforts to address antimicrobial resistance, we’re focused on facilitating the development of safe and effective new treatments to give patients more options to fight life-threatening infections. This approval also marks the second time a drug is being approved under the Limited Population Pathway for Antibacterial and Antifungal Drugs, a pathway, advanced by Congress, to spur development of drugs targeting infections that lack effective therapies. We hope we continue to see more development of antibacterial drugs for treating serious or life-threatening infections in limited populations of patients with unmet medical needs.”
Pretomanid in combination with bedaquiline and linezolid is approved for treating a limited and specific population of adult patients with extensively drug resistant, treatment-intolerant or nonresponsive multidrug resistant pulmonary TB. Multidrug-resistant TB and extensively drug-resistant TB are difficult to treat due to resistance to available therapies. According to the World Health Organization, in 2016, there were an estimated 490,000 new cases of multidrug-resistant TB worldwide, with a smaller portion of cases of extensively drug-resistant TB.
The safety and effectiveness of Pretomanid, taken orally in combination with bedaquiline and linezolid, was primarily demonstrated in a study of 109 patients with extensively drug-resistant, treatment intolerant or non-responsive multidrug-resistant pulmonary TB (of the lungs). Of the 107 patients who were evaluated six months after the end of therapy, 95 (89%) were successes, which significantly exceeded the historical success rates for treatment of extensively drug resistant TB.
The most common adverse reactions observed in patients treated with Pretomanid in combination with bedaquiline and linezolid included damage to the nerves (peripheral neuropathy), acne, anemia, nausea, vomiting, headache, increased liver enzymes (transaminases and gamma-glutamyltransferase), indigestion (dyspepsia), rash, increased pancreatic enzymes (hyperamylasemia), visual impairment, low blood sugar (hypoglycemia), and diarrhea.
Pretomanid used in combination with bedaquiline and linezolid should not be used in patients with hypersensitivity to bedaquiline or linezolid.
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