-- Study supports the dosing regimen that will be pursued in further      clinical programs -- No serious adverse events or QT prolongation      identified -- Planning underway to discuss results and the ongoing      clinical program with the FDA
  DANBURY, Conn. and WESTLAKE VILLAGE,      Calif., Sept. 06, 2022 (GLOBE NEWSWIRE) -- MannKind Corporation (Nasdaq:      MNKD), a company focused on the development and commercialization of      inhaled therapeutic products for patients with endocrine and orphan lung      diseases, announced today that it has successfully completed a Phase 1      study of clofazimine inhalation suspension (MNKD 101) and is planning      discussions with the U.S. Food and Drug Administration (FDA) regarding      results and the ongoing clinical program.
  Clofazimine is being      developed as an inhalation treatment option for nontuberculous      mycobacterial (NTM) lung disease. NTM lung disease is a serious infection      that is caused by bacteria common in the environment that can lead to a      reduction in lung function, cough, fatigue, and quality of life. It is      estimated that approximately 86,000 people in the U.S. are living with NTM      lung disease, and it is on the rise growing 8% each year with women, the      elderly, and those with underlying lung conditions at greatest risk.      MNKD-101 has been designated by the FDA as both an orphan lung and a      qualified infectious disease product (QIDP) for the treatment of pulmonary      NTM infections.
  "There is a high unmet need to develop medicines      that are well tolerated and effective in alleviating symptoms for those      living with NTM lung disease," said Michael Castagna, PharmD, Chief      Executive Office of MannKind Corporation. "As we continue to expand our      orphan lung diseases focus at MannKind, we are encouraged by what we are      seeing with inhaled clofazimine and the future potential to help patients."
  Study      MKC-CI -001 was a Phase I randomized, double-blind, placebo-controlled,      single- (SAD) and multiple-ascending dose (MAD) study to evaluate the      safety, tolerability, and pharmacokinetics (PK) of MNKD-101 in healthy      volunteers. The key safety findings of the study included:
  --      Clofazimine inhalation solution found to be generally well tolerated at      daily doses of up to 90 mg over a seven-day period -- No lab      abnormalities, QT prolongation, or serious adverse events identified
  "The      safety and tolerability results for inhaled clofazimine are encouraging      and we look forward to advancing the nebulized formulation of clofazimine      to the next phase of development," said Thomas Hofmann, Chief Scientific      Officer of MannKind Corporation. "Clofazimine presented as being very      lipophilic and demonstrated the expected therapeutic plasma concentrations      we were targeting. In future studies, we plan to evaluate the potential      for MNKD-101 to produce drug levels that exceed the minimum inhibitory      concentration in the lung beyond the treatment period."
  In the      SAD portion of the study, 24 adults were enrolled in one of three cohorts      (n = 8 per cohort) that received a single inhaled dose of 30 mg, 60 mg or      90 mg clofazimine, respectively. Participants resided at the clinical      research unit until day 5 post-dose, during which time they were evaluated      for safety and samples were collected for PK assessment. Participants      returned on days 8 and 15 for additional safety assessments and sample      collection. During the MAD portion of the study, 16 adults were enrolled      in one of two cohorts (n = 8 per cohort) that received a daily inhaled      dose of 30 mg or 90 mg clofazimine for a seven-day period. Participants      resided at the clinical research unit until day 8 post-dose, during which      time they were evaluated for safety and samples were collected for PK      assessment. Participants returned on days 15 and 36 for additional safety      assessments and sample collection.
  Additional data collected during      the MKC-CI-001 study is currently undergoing final analysis. Detailed data      findings will be presented in upcoming publications and scientific      conferences.
  About MannKind
  MannKind Corporation (Nasdaq:      MNKD) focuses on the development and commercialization of innovative      therapeutic products and devices to address serious unmet medical needs      for those living with endocrine and orphan lung diseases.
  We are      committed to using our formulation capabilities and device engineering      prowess to lessen the burden of diseases such as diabetes, pulmonary      arterial hypertension (PAH) and nontuberculous mycobacterial (NTM) lung      disease. Our signature technologies -- dry-powder formulations and      inhalation devices -- offer rapid and convenient delivery of medicines to      the deep lung where they can exert an effect locally or enter the systemic      circulation.
  With a passionate team of Mannitarians collaborating      nationwide, we are on a mission to give people control of their health and      the freedom to live life.
  Please visit mannkindcorp.com to learn      more, and follow us on LinkedIn, Facebook, Twitter or Instagram.
  Forward-looking      Statements
  This press release contains forward-looking statements      about the implications of clinical data that involve risks and      uncertainties. Words such as "believes", "anticipates", "plans",      "expects", "intends", "will", "goal", "potential" and similar expressions      are intended to identify forward-looking statements. These forward-looking      statements are based upon MannKind's current expectations. Actual results      and the timing of events could differ materially from those anticipated in      such forward-looking statements as a result of various risks and      uncertainties, which include, without limitation, the risk that continued      testing of an investigational drug product may not yield successful      results or results that are consistent with earlier testing, and other      risks detailed in MannKind's filings with the Securities and Exchange      Commission, including its Annual Report on Form 10-K for the year ended      December 31, 2021 and subsequent periodic reports on Form 10-Q and current      reports on Form 8-K. You are cautioned not to place undue reliance on      these forward-looking statements, which speak only as of the date of this      press release. All forward-looking statements are qualified in their      entirety by this cautionary statement, and MannKind undertakes no      obligation to revise or update any forward-looking statements to reflect      events or circumstances after the date of this press release. |