VIDA- Vitamin-D Add-on Therapy in Asthma

This study will enroll individuals 18 years and older who have vitamin D insufficiency and asthma with persistent symptoms despite low-dose inhaled corticosteroid (ICS). Subjects on low-dose ICS will be randomized to add-on therapy with either placebo or high-dose vitamin D for a 28-week period. The purpose of this study is to find out if taking vitamin D in addition to an inhaled steroid will help prevent worsening asthma symptoms and asthma attacks.

You may be eligible to participate in this study if you:

• Have had physician-diagnosed asthma for at least past 12 months.
• Are a male or female, 18 years of age or older.
• Are on a stable asthma controller therapy (inhaled corticosteroid or leukotriene modifier only) dose for past 2 weeks.
• Are willing to practice birth control for duration of study (in addition to not currently being pregnant or breastfeeding for females)

This is a partial list of eligibility requirements. To inquire about your eligibility, please call the contact number provided. If you wish to inquire via e-mail, please include the title of the study in your message.