My ex husband is on dialysis and has been a meth user for 8 years. Just recently he used meth again and missed his visits to dialysis. It's been a week and he is disoriented-not knowing month, year or where he's at, etc. He seems lucid but he's not himself. As of today he is still in the hospital. I'm wondering if this could be due to the meth use. If so will this be long term as far as his memory and speech is concerned?