Did one woman's pot go up in smoke?

(CNN) -- Elvy Musikka, 71, of Eugene, Oregon, says the post office lost something that could cost her more than just a buzz. She could lose her eyesight.

Six metal tins packed with medical marijuana joints --1,800 in all -- are in transit somewhere with her name on it. That's enough for up to 10 potent smokes a day for six months.

It's a prescription she receives twice a year to treat her glaucoma.

"I just don't know what to do," Musikka said.

Musikka says she's one of four remaining patients getting pot for free as part of a federal government program called Compassionate Use Protocol, developed in the 1980s.