High-dose Vitamin D Supplement for the Prevention of Acute Asthma-like Symptoms in Preschool Children

This trial is testing whether giving high-dose vitamin D supplements to young children (ages 1–5) who are admitted to the hospital with acute asthma-like breathing episodes can prevent future episodes. **You may be eligible if...** - Your child is between 1 and 5 years old - Your child has been admitted to a pediatric ward for an acute asthma-like episode with coughing, wheezing, or breathing difficulty - Your child is receiving or has received short-acting inhaled bronchodilators (SABA) as part of treatment, with or without inhaled corticosteroids **You may NOT be eligible if...** - Your child was admitted with pneumonia - Your child is already taking more than 400 IU of vitamin D per day - Your child has a condition where vitamin D supplementation would be unsafe Talk to your doctor to see if this trial is right for you.