SQL - Select like statement with variables

Hello experts,

I have a sql script here, that has a like portion of my where clause that is not behaving like I wish.  Here it is:

/********************************
DECLARE @MEDNAME varchar(500)
DECLARE @MED char(200)
DECLARE @Found int
SET @MEDNAME = null
SET @MED= 'Actoplus MET'

             select top 1 medication_name from patient_medication-- WITH (NOLOCK)
         WHERE enterprise_id = '00001'
         AND practice_id = '0001'
         AND person_id = 'C0B99DCB-8080-471C-BE3F-79B8EB02EBF7'
         and medication_name like '%' + @MED + '%' -- THIS LINE IN QUESTION

select @MED, @MEDNAME
*****************************/

When I include the medication_name piece of the w here clause, I get no returns.  If I take it out I get:

Actoplus MET 15 mg-500 mg Tab -- based on the select top 1 medication name piece.

FOr some reason my
SET @MED= 'Actoplus MET'

doesnt play well with my
and medication_name like '%' + @MED + '%'

Thoughts?

Thanks!