Plant will take more drugs and jobs.

• Position: TRIANGLE

British drug maker GlaxoSmithKline will invest $92 million to increase production at its factory in Zebulon in the next four years. It won't expand the size of the 918,000-square-foot plant, which opened in 1983, but will increase employment from about 800 to 1,000. Average pay for the new jobs should be about $30,000. GlaxoSmithKline will add product lines--it didn't specify which ones--and increase...