I started on 50MG of Naltrexone two days ago. I found I was very sleepy so I took only 25MG last night before bed and nothing today. It's 4:20pm ET and I still feel very sleepy and "out of it". I feel nothing like a zombie. I have no interest in drinking or doing anything but sleeping or laying down. Will this pass? Do I need to lower the dose more than 25MG to get use to it? I can't stay like this.