Theophylline is structurally classified as a methylxanthine. It occurs as a white, odorless, crystalline powder with a bitter taste. Anhydrous theophylline has the chemical name 1H-Purine-2,6-dione, 3,7-dihydro-1,3-dimethyl-, and is represented by the following structural formula:

The molecular formula of anhydrous theophylline is C₇H₈N₄O₂ with a molecular weight of 180.17. THEOLAIR Tablets contain 125 mg or 250 mg of theophylline anhydrous intended for oral administration. THEOLAIR (theophylline tablets) Tablets also contain: colloidal silicon dioxide, lactose, magnesium stearate, and pregelatinized starch.

Last reviewed on RxList: 4/7/2009
This monograph has been modified to include the generic and brand name in many instances.