What is this pill I found it had I8 on the front and nothing on the back and its white and oblong?

You are reading the imprint upside down, anyway your pill is:

Pill imprint 8I has been identified as Ibuprofen 800 mg.

Ibuprofen is used in the treatment of pain; back pain; osteoarthritis; headache; muscle pain (and more), and belongs to the drug class nonsteroidal anti-inflammatory agents. Risk cannot be ruled out during pregnancy.

Ibuprofen 800 mg is not subject to the Controlled Substances Act.

Click on the link to view an image of the pill:

https://www.drugs.com/imprints/8i-14304.html

Take care.-