Hi Smaryj, Thanks for writing your query. Diclofenac can cause increase in acididty and gas production. It should be taken after meals. You can take an antacid like Ranitidine 150 mg twice a day before meals along with Domperidone 10 mg. Antacid in liquid or gel form is also beneficial as it forms a protective layer over the damaged mucosa of the stomach. You should also follow some precautions like :- 1. Avoid spicy/oily foods. 2. Donot miss a meals. 3. Avoid emotional/mental stress. 4. Avoid cigarette/alcohol, if any. 5. Drink at least 8-10 glasses of water in a day. I hope this is helpful to you. Thanks.