Inj: Must be used immediately after the package is opened & the amp should not be exposed to light. Repeated IM inj at the same site in neonates, premature infants, infants & childn. The course of nerves for the site of inj. W/draw inj immediately & try different site if pain or blood reflux occurs. Not to be used over a period of mth if lacking satisfactory clinical response in patients w/ megaloblastic anemia or w/ peripheral neuropathies due to vit B
12 deficiency.