treatment and reconciliation

Hi.  My husband is once again struggling mightily with depression and other things.  Much of it is situational but it also seems clear to me that my husband feels better and functions better when he's on medications or in therapy and right now he's not doing either, because he chose to stop them.  I'm interested in learning other people's thoughts about whether my spouse would be more likely to stay on meds and in therapy if I stated my observation to him ("dear, you do actually get worse when you're not in treatment") and then suggested that he not make the decision to stop treatment without consulting someone (his therapist, his shrink, me, his GP).  Thank you.