Longer needles needed for fatter buttocks

"Nov 28, 2005 - CHICAGO (Reuters) - Fatter rear ends are causing many drug injections to miss their mark, requiring longer needles to reach buttock muscle, researchers said on Monday.

Standard-sized needles failed to reach the buttock muscle in 23 out of 25 women whose rears were examined after what was supposed to be an intramuscular injection of a drug. "