question: Hi Dr, My mother is a diabetic type 2 patient. Due to wheezing sound while sleeping, and troubled breathing caused by asthma she is taking deriphyllin retard 150 daily(1 tablet) prescribed by our family doctor. But still sometimes in the night or early morning she is feeling shortness in breath, coughing with phlegm(white only, kind off spit). Now Doctor is increasing the dosage to 2 tablets per day. Wanted to get second opinion if there are any side effects by increasing the dosage. Greatly appreaciate your reply and suggestions reagrding this. Thankyou Ram