question: hello dr. good morning......my baby is 5.5 months old and he is having prolonged cough.....my paedriatic has given hom anti biotics but it doesn;t give the results...now my dr. has advised me to go for t3-t4 test and blood test...is that essential.....betnesol is also given..can we give this corticosteroid at this age???will it not harm my baby???thanx a tonn for ur opinoin...