I'm sorry that you are going through this. I can not personally relate to your situation, as I don't have a spouse going through depression, but I myself am going through depression.

For me, it may or may not be seasonal; I don't know.

But in terms of medications, feeling like a zombie on one just may mean that that isn't the right medication. There are different medications do try. Is it possible for your husband to do therapy too? Therapy helps a lot for depression, and studies show that it does help too.

At least for me, I sometimes push people away when I have depression because I feel like a burden to them, and don't want them to feel the same way that I do, and feel that they don't want to hang around sad people. So it's always helpful to say that you are there for him, and that you may not understand the exact state he is in, but that you are willing to listen to him. Just say that every so often.

Other things to help with depression would be like eating healthy, having proper sleeping habits, getting exercise. Many of these things I stop doing because it's a symptom of depression. I tend to eat too much or too little, and sleep too much or too little. I always feel tired so I don't exercise. Is it possible for you and your husband to take a walk around the block everyday? I find that doing something makes me not feel as bad about myself.

The hardest thing for depression with me is getting out of bed. I have no motivation or energy to do things, so is there something you could do like say make/buy his favourite meal, watch his favourite movie, or something that would help motivate him to get out of bed (if this is struggle)? I also tend to lose interest in the things I love, so it may be hard to watch or do these things, as it isn't as exciting as it used to be. But you have to keep putting one foot in front of the other.

Also, if he can't do therapy, there are plenty of self-help books or free worksheets online you can print/download to do. CBT is currently the main therapy used for depression.

I hope some of this helps. The only thing you can do is be there for him.