What is a blue speckeled oval shaped pill with 2089 v?

The blue speckled oval-shaped pill imprinted with "2089 V" is identified as Diphenhydramine Hydrochloride 25 mg, a common antihistamine used to relieve symptoms of allergy, hay fever, and the common cold. It can also be used as a sleep aid due to its sedative properties. Always consult a healthcare professional before using any medication.