A nurse is caring for a client who is postpartum and has a migraine headache. The client has a prescription for ergotamine 2 mg sublingual PRN headache. Which of the following routes of administration should the nurse use?

A) Under the tongue: Ergotamine is prescribed for sublingual administration, which means the medication should be placed under the tongue for absorption. Sublingual administration allows the medication to be absorbed directly into the bloodstream through the mucous membranes, bypassing the gastrointestinal system and providing a quicker onset of action. B) Vaginal: Vaginal administration is not indicated for ergotamine, as this is not a typical route for the medication. Ergotamine is commonly used via sublingual, oral, or rectal routes for migraine treatment, but not vaginally. C) Topical: Ergotamine is not typically administered topically. The medication is designed for sublingual or oral use, so applying it topically would not provide the intended therapeutic effects for treating a migraine. D) Subcutaneous: While some medications are administered subcutaneously (under the skin), ergotamine is not commonly given via this route. The prescribed route is sublingual, and administering it subcutaneously would not align with the prescription and could potentially lead to improper absorption and reduced effectiveness.