Is it harmful to continue Lantus injections when pregnant?
A. Lantus (insulin glargine) is classified as Pregnancy Category C (either studies in animals have revealed adverse effects on the fetus and there are no controlled studies in women, or studies in women and animals are not available). Medications in Category C should only be given if the potential benefit justifies the potential risk to the fetus. More information is needed before Lantus is used routinely in pregnant women, although some physicians may choose to continue their patients on Lantus therapy throughout pregnancy. It has been recommended that women with preexisting diabetes taking insulin glargine be transitioned to NPH insulin, before pregnancy if possible or at the first prenatal visit. Please consult your physician to determine if Lantus is appropriate for you during pregnancy, or if a change in therapy is needed.
