The top common causes for a night time cough like this is asthma, GERD (or acid reflux as you stated), post nasal drainage (drainage from the sinus going down the back of the throat), and certain medications (including certain blood pressure medications known as ACE inhibitors like Lisinopril).
If sips of water was helping at one point, this is very consistant with acid reflux. I know you have tried tablet for reflux, but don't give up just yet. There are many on the market and some take 2-3 weeks to really fully become therapeutic.
Anything that interferes with our sleep is annoying and after 18 months, I can see where you are needing answers. Sounds like your ENT was on the right track and with the new inhalers for your COPD. And remember, COPD is typically driven by a combination of mucus hypersecretion and airway inflammation....all which can exacerbate at night. You did not mention if you were on any supplmental oxygen for your COPD, but if so, humidifying your O2 will also help with the tickle.
Hope this helps
Please ask for clarification if needed.
Ok, glad to hear the COPD is not out of control or bothering you to badly.
Protonix is a good medication for acid reflux, and so is Aciphex. Of course, you have the Nexium, Prilosec, and the other the counter H2 antogonist like Pepcid and Zantac, but with this, I would shoot for something like Protonix if your Dr is in agreement.
Also, glad to hear all other test were clear!
Yes, they should be available in Great Brittain.
Yes, these are prescription meds.
Acid reflux occurs because of incompetence of the lower esophageal sphinter....at times it will allow stomach contents to come back up into your esophagus and cause the cough. It does not stay 'open' all the time (or possibly everything you eat would come back up when you do things such as bend over), but rather gets 'relaxed' at times. When it does, you could be sensing it and having the urge to cough. Lying down often makes GERD worse...that is why most GERD (or acid reflux) patients elevate themselves on 2 or 3 pillows at night or elevate the head of the bed.