Clinical trials

The goal of this clinical trial is to learn if nebulized colistimethate sodium can prevent pneumonia in ventilated children. The main question it aims to answer is: • Does nebulized colistimethate sodium lower the number of times participants develop ventilation associated pneumonia? Researchers will compare nebulized colistimethate sodium to a placebo (a look-alike substance that contains no drug) to see if nebulized colistin works to prevent ventilation associated pneumonia in children. Participants will: * Take nebulized colistimethate sodium or a placebo twice a day for a maximum of 7 days. * Will be followed to check for pneumonia occurrence while they are on mechanical ventilation.