I have a pill (oblong tablet) and I am trying to find out it this is a motrin tablet. It has an m on one side and the number 1721 on the other side. Please advise.

If you don't know what it is you can call a pharmacist and ask them for verification,flush it down the toilet,or take someone's suggestion as to what it MIGHT be and take a chance they are wrong.

Look into the area you listed this question under and see the post at the top.

There is an announcement concerning pill identification here: https://www.askmehelpdesk.com/medications/

You will find the resources you need.