question: Hello Doc! How should  Deryphylin injection be administered to a patient suffering from acute Ashtma since past 50 years? Is it in combination with Betnesol? Is it intravenous or muscular?Dosage?Is it the last resort after inhalers like Seroflow 125 fail to comfort? Kindly give easily understandable answers so I can be ready with equipment if my father needs it. He is 75 and allergic to certain dusts and pollens,humidity,damp weather, and feels good in an air conditioned room.Thank you!Sunjay Somani