What about COBRA from his last job? DO you belong to any associations....AARP, etc? Most offer group insurance at a discount to members. Can you get the anti-depressant from your primary care physician? Can you use a mail order prescription plan that saves you money by one co-pay for multi-months' worth of drugs?

Look on the internet. I know some people have found insurance on there that is lower cost than COBRA.

Check with his employer. If he pays the entire spouse premium can they make the coverage available at group rates?