Hi, carbocisteine capsules or syrup is prescribed to help bring up mucus and can be very beneficial to those taking it. Once the mucus is coughed up, sometimes the coughing can subside for a bit to give some relief. Drinking warm drinks helps to thin out the mucus, some say put some fresh lemon in with cool boiled water. Also on prescription is codeine linctus medicine, it helps to stop the cough whilst offering some pain relief at the same time. Ask your GP about it.
Hope you get some help x