What is a tan color pill with bayer on front and a 20 on back?

A tan pill with "Bayer" on one side and "20" on the other is likely to be a Bayer aspirin, specifically a low-dose (20 mg) formulation. Bayer is a well-known brand for over-the-counter medications, particularly pain relievers. However, it's important to consult a healthcare professional or a pharmacist for accurate identification and confirmation of any medication. Always verify with official sources or databases.