Active substance

Theophylline Anhydrous

6 products from 2 companies contain this in United States.

6 prescription onlyCapsule, Extended ReleaseTablet, Extended Release

Prescription only

Theo-24100 mgPrescription onlyCapsule, Extended Release ENDO USA, Inc. · Theophylline Anhydrous Theo-24200 mgPrescription onlyCapsule, Extended Release ENDO USA, Inc. · Theophylline Anhydrous Theo-24300 mgPrescription onlyCapsule, Extended Release ENDO USA, Inc. · Theophylline Anhydrous Theo-24400 mgPrescription onlyCapsule, Extended Release ENDO USA, Inc. · Theophylline Anhydrous Theophylline (anhydrous)400 mgPrescription onlyTablet, Extended Release Westminster Pharmaceuticals, LLC · Theophylline Anhydrous Theophylline (anhydrous)600 mgPrescription onlyTablet, Extended Release Westminster Pharmaceuticals, LLC · Theophylline Anhydrous

Same substance is not the same product. Strength, form, release mechanism and other ingredients all differ. Whether one can replace another is a decision for a pharmacist.