RT Journal
A1 Zhang Y, Zhou L, Gellad W
T1 THe true cost of discounted medication programs—reply
JF Archives of Internal Medicine
JO Archives of Internal Medicine
YR 2011
FD September 26
VO 171
IS 17
SP 1595
OP 1596
DO 10.1001/archinternmed.2011.412
UL http://dx.doi.org/10.1001/archinternmed.2011.412
AB 
First, if we had data, we would try to quantify the traveling costs. However, traveling costs can be easily overestimated because individuals are unlikely to go to WalMart or Target just to pick up $4 drugs; they go there for other things or stop over on their way. In addition, traveling costs will not be a main concern as more stores (eg, Walgreens, CVS, local regional grocery stores) offer low-cost generics and mail-order option of these programs becomes available.2