Veterinarians frequently prescribe aminophylline for dogs and cats suffering from asthma or bronchitis even though it is not currently approved by the FDA for use in animals. Aminophylline belongs to a class of drugs called bronchodilators, used to relax the smooth muscle wall in the airway and allowing unrestricted air passage.

Dosage:

Aminophylline is available by prescription for dogs and cats. It is available in tablets, oral liquid, injection and suppository form.

Dog:  10 mg/kg orally every 8 hours

Cat: 6.6 mg/kg orally every 12 hours

Use with caution in animals with cardiac arrhythmias and animals prone to seizures.  Side effects, however, appear more common in humans than animals.  Side effects include vomiting, diarrhea, anxiety or nervousness, insomnia, increased hunger or thirst and urination.  Side effects may subside with continued therapy or may require dosage adjustments.