SEATTLE — Amazon.com Inc. is expanding delivery of Bartell Drugs’ inventory to its Amazon Prime Now customers in the Greater Seattle area.

The expansion was announced about 10 weeks after Amazon selected Bartells as the first drug store to sell merchandise through its Prime Now one- and two-hour delivery service.

About 90% of Bartell’s inventory of grocery, health and beauty items is available through the program.

Amazon said in late January that it expanded the service to Everett, Issaquah and Normandy Park. The original rollout provided delivery from Bartells stores to users of the Amazon Prime Now app in certain Greater Seattle areas, including Capitol Hill, Columbia City, Mercer Island, Renton, Sammamish and the University of Washington.

One-hour delivery costs $7.99, while two-hour delivery is free to Prime subscribers, who pay $99 a year for free-delivery options as well as streaming media and other perks.

Amazon Prime Now is a stand-alone site and mobile app that offers same-day delivery in selected ZIP codes. The service is available in more than two dozen U.S. cities.

“Bartell Drugs has always stressed convenience as well as quality of products and service,” said Brian Unmacht, president and chief executive officer of the 126-year-old company. “Bartells is excited to leverage Prime Now’s service to offer the large number of local online shoppers our diverse and quality product selection, along with the added convenience of quick delivery.”

Bartell Drugs is the nation’s oldest family-owned drug store chain, with 65 locations in Washington’s Puget Sound region.