thank you very much for these suggestions . i will try them. i'm assuming that the Nat Sul 1m is a one time only dosage, not every night?
coughing a little less today, mostly when lying down or after physical activity.
a walk in fresh air is a good idea. i live in one of the dirtiest and most polluted dusty parts of the city but will head to the beach for some real oxygen!
many thanks to you all.