Mail order medicine is old news. But big pharma's attempts to squeeze every last nickel out of its top selling drugs now includes home delivery of a different sort, and  AstraZeneca will host a Twitter Chat at 7 p.m., Thursday (tonight) from @AstraZenecaUS to discuss its program. The hashtag is #AZDirect.

Two AstraZeneca executives are scheduled to answer questions about the company's program: Linda Palczuk, a VP for Cornerstone and Commercial Excellence, and Rick R. Suarez, an executive director, GI and Foundation Brands. Through the program called AstraZeneca Direct, the company - via pharmacies and pharmacists, it says - is selling Arimidex and Nexium.

AstraZeneca, which recently fought off a takeover bid by Pfizer, is headquartered in London, but has operations in Wilmington and Newark, Del.