Pharmaceutical Last year, US consumers and their insurance companies spent $4.8 billion on Nexium (esomeprazole, a blockbuster drug from AstraZeneca) one of six proton pump inhibitors (PPIs) currently available, making "the purple pill" the second highest-selling drug in 2008, behind Lipitor (atorvastatin, the cholesterol-lowering, all-time biggest selling drug from Pfizer, reports Consumer Reports' Best Buy Drugs. 'It's no wonder: a month's supply of Nexium has a retail price tag of up to $240 a month, compared to just $24 a month for an over-the-counter PPI,' it observes. 30 October 2009