My daughter is 4 yrs old... no past history of any nature. However, she has been suffering from cough nd cold (flum) periodically for the past three months.... initially we gave tixylix, levolin. Again on consultation, we gave ventorlin, cheri cough, novomax. Unfortunately nothing has subsided her cough. We are worried now, and thinking of taking a blood test... pls help us wit a solution....