1. Primaxin (imipenem) Prescribing Information.
   http://www.merck.com/product/usa/pi_circulars/p/primaxin/primaxin_im_pi.pdf. Accessed June 23, 2008.
2. Merrem (meropenem) Prescribing Information. http://www.astrazeneca-us.com/pi/MerremIV.pdf. Accessed June 23, 2008.