Verificar si existe un procedimiento almacenado

IF EXISTS (SELECT * FROM sysobjects WHERE type = 'P' AND name = 'SP_ver_rcv')
BEGIN
DROP PROCEDURE SP_ver_rcv
END
GO
CREATE PROCEDURE SP_ver_rcv
AS
BEGIN...
.
.
.

fuente: https://msdn.microsoft.com/en-us/library/dd996513.aspx