I've had persistent coughing and postnatal drip for several months. i have asthma but am not on routine meds. should i be?

Likely need medicine: Symptoms of persistent cough and post-nasal drip could be related to asthma, allergies or even indigestion/reflux. Recurrent coughing (esp at night) associated with shortness of breath is worrisome for asthma - the most likely diagnosis (dx) esp if there is prior known history of asthma. Allergic cause more likely if itchy eyes, sneezing - but often coexists with asthma. Need to see MD for dx/med.