What kind of pill is pink with 25 on it?

A pink pill marked with "25" is typically identified as Diphenhydramine Hydrochloride 25 mg, an over-the-counter antihistamine used to relieve allergy symptoms, hay fever, and cold symptoms, as well as to aid sleep. It may also be used to prevent nausea and motion sickness. Always consult with a healthcare professional or pharmacist for accurate identification and to ensure safety.