I don't know if it's been mentioned or not, but you can actually get up to 10% (or more in some cases) off at Target if you use their Pharmacy. Basically for every 5 prescriptions that you fill at Target you get a coupon for 5% off all day, which can be combined with the 5% discount for using the Target red Debit/Credit card. By doing this, you end up at 10%.
You can also combine the 5% discount from the Pharmacy when paying with Target gift cards (which can be used to buy Disney Gift Cards, they just can't be used to by ones with Visa/Mastercard logos on them or other Target gift cards according to the fine print on the back of the gift card). Keeping this in mind, when you Target often offers a deal of a $25 gift card with each transferred or new prescription. So, you can get the 5% discount and free giftcards.
We also frequently get $5 off a $50 or more purchase in the mail, which can also be combined with any of these offers and used on Disney Gift Cards.
So, with 5 prescriptions you can end up with the following:
Buy $150 Disney Gift Cards (They are sold in $50 increments)
-$15 (10% discount by combining the Target Debt/Credit card and Prescription Discount)
-$5 of of $50
-$125 (5 x $25 Gift Card for Prescription Transfer)
Total Cash Needed (not including your prescription copays, which would be paid no matter where you get your prescriptions from): $5
Gift Cards Received: $150
Pretty good value there to me, no it won't work all the time, but depending on how many prescriptions your family has may work a few times.