When it comes to dosages of cold medicine, your kitchen spoons may not be measuring up. Using spoons to measure medicine may be causing you to under or overdose, according to new research in the Annals of Internal Medicine.

“Spoon dosing has been identified as 1 of the 3 major causes of dosing errors and pediatric poisonings,” authors of the study wrote. “Most persons still use spoons when pouring medicine for themselves and their families.”