What is a bar pill with g3722 on it?

A bar pill marked with "G3722" is identified as Diphenhydramine Hydrochloride 25 mg, which is an over-the-counter antihistamine commonly used to relieve symptoms of allergy, hay fever, and the common cold. It is also used as a sleep aid due to its sedative properties. The pill is typically pink and rectangular in shape. As always, it's important to use medications as directed and consult with a healthcare professional if you have any concerns.