Everyone is different, and many of us respond to meds differently as a result. A med that works for one person, may not work for another person - even if they have the same diagnosis. Lamictal did not kill happiness for me. It did, however, help me remember what real happiness felt like.

I'm of the opinion that if the meds make you feel like a zombie, you are not on the right cocktail.

Also, happiness in my opinion should not be solely dependent on meds. It is really possible to feel happy without feeling hypo/manic if you have the right meds, the right therapist, and the right environmental changes going on.