To insert a suppository, lie on the left side of the body with the right knee bent. Use a clean finger to push the suppository well up the rectum, tapered end first, according to WebMD. Once inserted, stay still until there is a strong urge to have a bowel movement.
If the suppository is too warm to insert at first, it can be chilled in the refrigerator for 30 minutes. Alternatively, you can run cold water over the sealed foil package, states WebMD. To make insertion easier, the suppository can be moistened with a bit of warm water. Don't use any other lubricant, as it can affect the efficacy of the suppository.