Simvastatin and coming home

My husband has been on Simvastatin for a few years, six months ago his dose was increased to 40mg, since then he has become someone I don't recognize, we have been married over twenty years and he used to be a very placid and wonderful man. He is now both verbally and physically abusive, he threatens me with divorce on a regular basis. He lies about me to others telling them he does all the housework (never) there is never any food in the house ( Totally untrue) He disappears for hours on end, and sleeps much of the time. He can be quite plausible with other people but turns into a monster when he returns home. Doctor told me I don't think it can be the statin, don't believe everything you read on the internet! She said to be sure for him to come off it for a few weeks - he refused! His aggression is escalating and I now dread him coming home. he has odd moments of being nice but within hours he is back to being nasty. He had been impotent for 7 years but now during his "nice moments" becomes amorous! I am at my wits end, has anyone else experienced this!