Hi, If your daughter is having flu with asthma and she is coughing continuously then it could be allergic bronchitis, infective bronchitis or severe upper respiratory infection or pertussis etc. Albuterol is a bronchodilator and can be used in asthmatic attacks but here she is having dry,non productive cough then it has no role. You can give brovex PEB or cheratussin but the important thing is to diagnose it first. You can take her to pediatrician for detailed history and thoroughly respiratory system examination. She may require antibiotics(quinolones or macrolides) orally in syrup forms with other symptomatic treatment like cough suppressants or saline nebulizers with steam inhalation to get rid off infection complete. So,better go to pediatrician rather than self medication.