INDIANA, (WOWO): CVS stores have pulled tobacco from their shelves. Now, the drugstore chain plans to make sure customers think twice about filling prescriptions at other stores that still sell tobacco.

CVS is developing a new tobacco-free pharmacy network for clients of its Caremark pharmacy benefits management business. 

The network would slap an extra co-payment on patients who fill their prescriptions at stores that still sell tobacco. That payment won't apply to prescriptions filled in the tobacco-free network, which would include CVS and Target locations nationally, as well as other pharmacies that abstain. 

The tobacco-free network would only be used by the pharmacy-benefit management customers that choose it.