Acid reflux drugs like Omeprazole, taken by millions of people in the UK every day, may trigger migraines, according to research from the USA. American scientists found that people who take acid-reducing tablets may be at higher risk of suffering the debilitating headaches than those who don't. The drugs include proton pump inhibitors (PPIs) such as omeprazole and esomeprazole, histamine H2-receptor antagonists, or H2 blockers, such as cimetidine and famotidine, and antacid supplements. Acid