If you mean "acute interstitial pneumonia", there is no known treatment. The cause is also unknown, and results in a variation of ARDS.
Look under "Hamman-Rich Syndrome" for more information.
Try this one, it'll point you in the right direction:
http://en.wikipedia.org/wiki/Hamman-Rich…
According to the above link, "Treatment of HR syndrome is primarily supportive. Management in an intensive care unit is required and the need for mechanical ventilation is common. Therapy with corticosteroids is generally attempted, though their usefulness has not been established as of 2005."
Good luck to you.
