Strange behavior

My husband started taking zocor about a year ago, I noticed a difference in his behavior but it was somewhat gradual. 2 weeks ago he went into a rage screaming and yelling at me I scared to death I had seen him angry but nothing like this. He came back packed his stuff and had been gone for 2 weeks now. When I try to talk to him he keeps saying "he don't know what he feels anymore" he will not return any of his friends phones calls. When I started reading some of the side effects I now wonder if the zocor has something to do with it. He has complained about leg cramps, numbness, back aches for a week or so but he dismissed the problem to something else. Has anyone experienced emotional issues? He tells me he don't have any feelings anymore. I even remember several months ago I was crying and he looked at me and said "oh stop that cry baby stuff" very hateful. its like his brain is not processing emotions.