I did that a couple times, 2ml which equals to more or less 130 mg. It didn't knock me out since I've been a regular benzodiazepines user for years, but after 30-45 minutes I started to feel very tired and went to bed, it made me sleep for 12 hours straight. A weird sleep though, too deep and not very relaxing, both times I woke up with a headache and felt very tired the entire next day.