my mother 67 years old lady. now last one week she is affected by asthma.past 10 years she is taking deriphillin retard 150 tablet.last month she is affected by low sodium in blood(106).doctor completed changed her tablets. she is eating nitro contine 2.6,cordonine100mg,storcit 500mg,deriphillne 100mg (daily twice)gluimiline 2mg and pan40(morning),caat 10mg and alpraex .25mg(night),clopilet A 75mg(after noon). but last two days we are using deriphilln retard150 3 times daily and she is taking injection also.kindly give advice.