Aspirin in Acute Pneumonia in the Elderly: a Multicenter, Double-blind, Randomized, Placebo-controlled Trial.

Patients will receive 100 mg acetylsalicylic acid (or Aspirin) orally (tablet) once a day (or intravenously if oral administration is not possible in the acute phase of pneumonia), introduced within 84 hours of pneumonia diagnosis, for 90 days.

patients in the placebo group will receive 100 mg placebo acetylsalicylic acid orally (tablet) once a day (or intravenously if oral administration is not possible in the acute phase of pneumonia), introduced within 84 hours of pneumonia diagnosis, for 90 days.