The Greek physician Hippocrates, also known as the father of medicine, prescribed olive oil to treat muscular pains, ulcers, and cholera. However, over the ages, there has been numerous folk medicine uses for olive oil. Olive leaf extract is a late bloomer to the nutritional supplement industry.
Weekdays: Walgreens store business hours are 8 a.m. to 10 p.m. Monday to Friday. There are some locations that are open 24 hours a day. You can find 24-hour Walgreens locations using the store locator [+]. Hours for the pharmacy are different from the Walgreens store business hours. Pharmacies are open from 8 a.m. to 10 p.m.
If you mean 24-hour, in-store, customer service (financial services, returns, etc.) the answer is no. The customer service desk closes at 10 pm and reopens at 8 am at 24-hour Walmart Supercenters and Neighborhood Markets. Usually the one at my store closes around 10 PM and opens back up at 7 am.