Many chain pharmacies such as CVS and Walgreens offer 24-hour pharmacies at some locations, according to the stores' websites. Wal-Mart locations often offer Sunday hours at their pharmacies as well.
To find a Walgreens location with a pharmacy open on Sundays, navigate to the Walgreens store locator, enter your ZIP code, check the box for Pharmacy Open 24 Hours, and click on Find A Store. To find a CVS location that can fill prescriptions on Sundays, go to the CVS store locator, enter your ZIP code, click on 24-Hour Pharmacy and then click on Find A Store. Another option is to use the Pharmacy Locator at MP.Medipact.com by entering your ZIP code and clicking on Open 24 Hours.