I found a white round pill with F R imprint on the front and plus sign on back?

Buffitno1; This pill is missing a number if it is a rx drug or vitamin.Better double check with brother nothing can be looked up with this info. Here is what is said about pills with wrong type markings.Chuck1957

A solid oral dosage form drug product that does not meet the requirement for imprinting and is not exempt from the requirement may be considered adulterated and misbranded and may be an unapproved new drug as defined by the FDA. Also, if a pill or capsule has no imprint and is not an approved medication it may be a vitamin or other dietary supplement, illegal drug of abuse, foreign medication or even candy.

Do Illegal Drugs, or Other Drugs of Abuse Have Imprint Codes?

Some illegal drugs, such as Ecstasy, come in tablet formulations of various colors and contain an imprint or design that is appealing to a younger age group, such as a flower, a smiley face, or other common logo. In addition, other drugs of abuse such as LSD, are often concealed in candy like Sweet Tarts by placing a drop of the drug on the candy. LSD is also commonly placed on sheets of paper imprinted with a design, and then smaller squares of the paper are cut out for illicit trafficking. These imprints, because they are manufactured illegally, are not available for identification in the Pill Identification Wizard.