This study will evaluate the safety and efficacy of an experimental antibiotic, solithromycin, in the treatment of adult patients with community-acquired pneumonia.

Community-acquired bacterial pneumonia (CABP) is an acute infection of the pulmonary parenchyma with symptoms such as fever or hypothermia, chills, rigors, chest pain, and/or dyspnea. The widespread emergence of antibiotic resistant pathogens, including the macrolide-resistant Streptococcus pneumoniae, has resulted in a need for new and effective antibiotics that have activity against CABP pathogens. Solithromycin is a fourth generation macrolide antibiotic with excellent activity against resistant S. pneumoniae and other key typical and atypical bacterial respiratory pathogens. A completed Phase 2 study showed comparable efficacy to levofloxacin in adults with CABP.

Inclusion Criteria:

• Male and female patients ≥ 18 years of age

• An acute onset of at least 3 of the following signs and symptoms (new or worsening):

  1. Cough
  2. Production of purulent sputum
  3. Shortness of breath (dyspnea)
  4. Chest pain due to pneumonia

• At least 1 of the following:

  1. Fever
  2. Hypothermia
  3. Presence of pulmonary rales and/or evidence of pulmonary consolidation

• PORT Risk Class II, III, or IV

• Presence of lobar, multilobar, or patchy parenchymal infiltrate(s) consistent with acute bacterial pneumonia on a pulmonary imaging study

• Not received any systemic antibiotics during the prior 7 days

Exclusion Criteria:

• Ventilator-associated pneumonia
• Known anatomical or pathological bronchial obstruction or a history of bronchiectasis or documented severe chronic obstructive pulmonary disease
• Hospitalization within 90 days or residence in a long-term care facility within 30 days prior to the onset of symptoms
• Fungal pneumonia
• Pneumocystis jiroveci pneumonia
• Aspiration pneumonia
• Other non-infectious causes of pulmonary infiltrates
• Primary or metastatic lung cancer
• Cystic fibrosis
• Active or suspected tuberculosis
• HIV or myasthenia gravis