The husband of a woman who died after taking a powerful painkiller is suing Longs Drugs and the pharmacist who filled the prescription.

Andrea Benedi-Wells, 32, died July 31, 2012. She left behind a husband, 3-year-old son and soon-to-be 1-year-old daughter.

The Honolulu medical examiner says Benedi-Wells died from the combined toxic effects of Tramadol and Fentanyl, two synthetic narcotic painkillers.

Andrea’s widower, Daniel Wells, a military service member formerly assigned to Marine Corps Base Hawaii, sued Kailua physician Jason M. Florimonte, the doctor who prescribed the Fentanyl, last December for medical malpractice.

On Monday, he added Longs and pharmacist Catherine S. Lau to the lawsuit.