What pill is stamped with I10?

The pill stamped with "I 10" is identified as Diphenhydramine Hydrochloride 25 mg, a generic version of Benadryl. It is an antihistamine commonly used to relieve symptoms of allergy, hay fever, and the common cold, such as runny nose, sneezing, and itching. It can also be used as a nighttime sleep aid due to its sedative effects. Always consult a healthcare professional before using medication.