Hi Fiona,
Acid Reflux has two elements: acid (which is a chemical concern) and reflux (which is a mechanical action). Both need to be tackled.
You may be able to reduce the acid you produce through dietary measures. If you keep a food diary, you may identify which foods cause you poblems. We are all different and react to foods differently. You will find lists of "banned" foods but take these only as suggestions: they're commonly reported triggers but yours may be different.
The normal treatments for acid reflux tackle the acid, as it's easier, and render reflux less harmful. If you visit the free book / website www DownWithAcid org uk and find the Medicines page in the Acid section, it describes the four different types of acid neutraliser:
1. Normal antacids (like Tums) will neutralise excess acid once it has been produced.
2. Alginates (like Gaviscon) neutralise whilst also forming a temporary coating to the oesophagus and floating like a blanket on top of the acid in the stomach to prevent it splashing back. Again, it works on the acid nce it has been produced.
3. A Histamine H2 Receptor Antagonist (H2 blocker like ranitidine / Zantac) blocks some of the signals from the brain telling the stomach to make acid. It is used pre-emptively and usually works for about 12 hours.
4. The most powerful acid suppressant medication is the family of Proton Pump Inhibitors (PPIs which includes omeprazole and Nexium). Proton Pumps are formed as required when the stomach makes acid. PPIs prevent some of them being made thus reducing the amount of acid available in the stomach.
However, although acid suppressants are excellent at their job and have been, and are, used by millions world wide for the last 30 years, they are not good at reducing the reflux element. For that lifestyle modifications may be required.
The cough is a symptom of the reflux rather than the acid. Refluxate doesn't have to be acidic to be dangerous: it can travel the full column of the oesophagus and breach the upper oesophageal sphincter whence it may aspirate into the lungs.
To reduce reflux, lose weight if necessary, avoid over-fillig your stomach by eating small portions and more froequently, avoid exercise after food (including bending) that will compress the stomach. Avoid tight clothing. Leave at least 3 hours between last meal and bed. Raise the head of the bed by 6 to 8 inches on blocks.
If lifestyle modification doesn't work, you may need to consider surgery (a fundoplication) to reduce the reflux.