What are theophylline agent (or "maintenance" or "long-term control") bronchodilators?

Theophylline agents include theophylline products and aminophylline products. Theophylline products are Elixophyllin®, Theobid®, Theo-24®, T-phyl®, and Uniphyl®. Aminophylline products are Phyllocontin® and Truphylline®.

What do maintenance bronchodilators do? How are they supplied?

These products do the following:

Maintenance bronchodilators are available in tablet, capsule, and liquid forms.