And does it matter whether you chew a Tums or pop a Prilosec for heartburn ... you walk out after trying to figure out which drug to buy. To take the guesswork out of shopping for over-the ...

Until the 1950s, Americans could even buy an antacid made from papaya enzymes: Johnson & Johnsons Papoids, which, along with Tums, was one of the first to come in easy-to-pop tablet form.