Hi thanks for your question.Cough
of asthmatic bronchitis
should respond to steroids
. Yes I can understand the muscle pain
and spasm you must be having due to persistent coughing. Muscle relaxants are not recommended for cough, as cough is not initiated by muscle. Cough center lies in brain, which is stimulated by irritations in the respiratory system. For controlling cough you have to either remove the stimulus from the respiratory system or suppress the cough center. Consult a physician who may be able to prescribe you cough suppressant which will not interfere with your asthma. Hiccup
has different mechanism.
Hope this answers your question.