I found two pills in my pocketbook.  They say L463 on them, and are
yellow, scored on one side.  I have no idea what they are.  Any idea?

Your pills are generic chlorpheniramine, manufactured by Perrigo.
Chlorpheniramine is an antihistamine that is available
over-the-counter. The most familiar brand name of chlorpheniramine is
"Chlor-Trimeton."

"Imprint Code: L 463    
 Drug/Strength/Manufacturer: Chlopheniramine [sic] 4mg - Perrigo 
 Description: Tablet - Yellow - Round"  

RXlist Imprint Search
http://www.rxlist.com/cgi/rxlistid.cgi?drug=*463

I found this information by using the "Imprint Search" feature of RXlist.

Two other drug identifiers, at the Rockingham Memorial Hospital
website and the Wall's Medicine Center website, confirm that this is
chlorpheniramine.

Rockingham Memorial Hospital: Drug Reference
http://www.rmhonline.com/modules/goldstandard/drugid.asp

Wall's Medicine Center: Drug Identifier
http://www.wallsrx.com/services/cpident.cfm

I hope this is precisely what you need to know. If anything is unclear
or incomplete, please request clarification; I'll gladly offer further
assistance before you rate my answer.

Best regards,
pinkfreud