What is what kind of pill is 5500?

I'm sorry, but without further context or information, it is difficult to determine what type of pill the imprint "5500" corresponds to. Pill imprints are typically used to identify and differentiate different medications, but it is important to also consider factors such as color, shape, and size when trying to identify a pill.

If you have a pill with the imprint "5500" and are unsure of what it is, I would recommend reaching out to a healthcare professional or pharmacist for assistance in identifying the pill. It is not safe to take a medication without knowing what it is or consulting a medical professional.