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Hello, I'm Dr Gary. I've been practicing veterinary medicine since 2007. I look forward to helping with your questions/ concerns.
When I'm dealing with asthma cats, I don't typically use oral broncho-dilators. They can have systemic effects of agitation and rapid heart rate that I just don't like.
I typically use oral Prednisolone, inhaled Flovent and inhaled Albuterol. Albuterol is the broncho-dilator. I don't often have owners use it daily, but in an as needed basis. It may end up being 1-2 times daily, but if he's having a good day I wouldn't use it at all.
In some cats, I can get them off Prednisolone and just use all inhaled meds. Those don't have the systemic side effects, so I find them to be better tolerated. Some cats just don't stay controlled without an oral steroid, so I may have to use it.
For now, I would discuss stopping the oral Theophylline and switch to Albuterol inhalers.
I hope this helps, let me know if you have any other questions.