Buying a name-brand product with a coupon usually is more expensive than a generic product without a coupon.

FORBES: Six Sneaky Ways Coupons Make You Spend More

According to the 2010 RBC Capital Markets study, when trial victories, settlements between drugmakers and dropped cases are combined, generic companies were able to bring their product to market before the brand-name drug's patent expired in 76 percent of the 371 drug patent suits decided from 2000 through 2009.

NPR: Court: Can Drug Companies Pay To Delay Generics?

Brand-name drugmakers, though, can update warnings and precautions on product labeling before obtaining FDA approval.

FORBES: Pfizer Wants Court To Rehear Generic Labeling Case And Avoid Tort Hell