AdHD and delusional behaviour?

Does anyone experience a husband or wife who goes through a paranoid period and starts accusing me of having affairs 10-15 years ago? Needless to say, I have never been unfaithful to him.He had a meltdown due to overwork and had to use drugs to stay awake in 2000.  Got involuntarily committed for a week and a few years later finally managed to get prescribed dex. we got married after a couple of years of separation  in 2007. Since then, he has an episode of accusing me - usually of having affairs with the people we worked with. I just rang his pychiatrist in desperation and he says that the mix of marijuana and dex has now proven to be a bad combination. He need to stop pot and take anti-pyschotic to calm his mind. We know how well that when when I texted him to gently say we should try his psch's advice. I'm currently in a cafe waiting for him to stop ringing, texting me and asking me to explain 4 events that happened in 2000 - 2005 and apologise for having those affairs. He says that he will forgive me as all he wants is honesty. I keep maintaining calmly that I have been truthful and can't apologise for something I did not do. Don;t even know what the other 2 things he wants me to explain is all about. I had blocked so much out during those years of complete turmoil.