It’s amazing how many people spend money on name brand aspirin, even though the active ingredient is the same in all aspirin. As long as the dosage is the same in both, save yourself some money and buy the cheapest variety. If you use a lot of it, buy it in a big bottle for even more savings.
This rule applies to any number of other drugs that are now available in generic form. One example that comes to mind are antihistamines or allergy drugs. These are very expensive if you buy the name brand product, but if you buy the large generic bottle, you can get it for half price or less. Again, just make sure you are purchasing the one with the same active ingredient as there are many types of antihistamines.