What pill is 20 BL?
Excuse me, but could you clarify what you mean by "20 BL" when referring to a pill? Is this a specific medication code, a street name for an illicit drug, or a reference to a particular dosage form or brand? Without more context, it's difficult to give an accurate description. Could you please provide more information about the context in which you encountered this term, such as the country or region where it's used, any additional letters or numbers that may be associated with it, or any other details that could help narrow down the possibilities?