What is red oblong pill 271?

The red oblong pill imprinted with "271" is identified as Diphenhydramine Hydrochloride 25 mg, which is an antihistamine commonly used to relieve symptoms of allergy, hay fever, and the common cold. It can help alleviate symptoms such as sneezing, runny nose, itching, and hives. Additionally, it is often used as a nighttime sleep aid due to its sedative properties. Always consult a healthcare professional before using any medication.