Why did the price of my prescription change since my last purchase?

Drug prices are dif­fer­ent from phar­ma­cy to phar­ma­cy. Even chains have dif­fer­ent prices in their stores depend­ing on the pop­u­la­tion they are ser­vic­ing. Addi­tion­al­ly, man­u­fac­tur­ers’ drug prices change peri­od­i­cal­ly.