Hi, Lubowel is lubiprostone. It is used in constipation as laxative. Since he has no diarrhea symptoms, it is not indicated. Stomach pain which is postural and disappears on lying down may be muscle related. If it has started recently, any cause of abdominal muscle pull/ rupture needs to be ruled out. It should disappear within one or two months, if adequate rest is taken without putting more stress on abdominal muscles. Acidity pain is not postural related and usually increased if associated with reflux esophagitis, it increases more during lying time post food. He can take Histamine H2 blockers like ranitidine or proton pump inhibitors omeprazole group drugs to reduce acidity and bloating sensation. During severe pain he can try antacids for immediate relief. He can taken prescription from his doctor for this. Good nutritious diet is important along with mild exercise. Fiber diet could reduce bloating sensation. If you have any further queries, happy to help.