Following code will help to find all the Stored Procedures (SP) which are related to one or more specific tables. sp_help and sp_depends does not always return accurate results.
----Option 1
SELECTÂ DISTINCT so.name
FROM syscomments sc
INNER JOIN sysobjects so ON sc.id=so.id
WHERE sc.TEXT LIKE '%tablename%'
----Option 2
SELECTÂ DISTINCT o.name, o.xtype
FROM syscomments c
INNER JOIN sysobjects o ON c.id=o.id
WHERE c.TEXT LIKE '%tablename%'
Reference : Pinal Dave (http://www.SQLAuthority.com)