Ephedrine + Phenobarbital + Theophylline Forums

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I am wondering about the side affects of the Theophylline? I have asthma, and have been suffering since thanksgiving with severe attacks. My doctor prescribed this, not sure it is helping. ## Theophylline can cause nausea, vomiting, diarrhea, increased urination, increase in heart rate, abnormal heart rhythms, restlessness, headaches, insomnia, irritability, dizziness and lightheartedness.

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