Never share an injection pen or syringe with another person, even if the needle has been changed.
Before taking this medicine
You should not use  insulin glargine if you are allergic to insulin, or if you are having an episode of hypoglycemia (low blood sugar) or diabetic ketoacidosis (call your doctor for treatment).
Insulin glargine is not approved for use by anyone younger than 6 years old, and some brands are for use only in adults. Do not use this medicine to treat type 2 diabetes in a child of any age.
Tell your doctor if you have ever had:
liver or kidney disease; or
heart failure or other heart problems.
Tell your doctor if you also take pioglitazone or rosiglitazone (sometimes contained in combinations with glimepiride or metformin). Taking certain oral diabetes medicines while you are using insulin may increase your risk of serious heart problems.
Tell your doctor if you are pregnant or breastfeeding.
Follow your doctor's instructions about using insulin if you are pregnant or you become pregnant. Controlling diabetes is very important during pregnancy, and having high blood sugar may cause complications in both the mother and the baby.
