Walgreen's was selling 30-pack bottles of their store-brand Claritin for 1/2 price. One of these bottles is free with a rebate. At 1/2 price, it's considerably cheaper to buy 3 30-packs than one 90-pack.
I got 4 because our insurance company now hates my sweet, sweet Allegra and I'm looking to switch allergy meds. If the Claritin doesn't work out for me it's still okay because
mrsmetallian takes it.