My tolerance has starting increasing quickly as of late. I need at least 2ml to feel any decent effects. I've taken about 2.2ml, but I ate quite a large dinner a few hours ago so I may not feel much.
To the people with dependency: try weed and alcohol to get you through it. The alcohol should help with the shakes and other symptoms, while weed should keep you happy.
When I stopped after running out, I drank a couple of pints before I slept, every night, for about three or four nights. It made me sleep soundly and didn't have any problems this way.
EDIT: It has been 30 minutes since I necked the 2.2ml, so I topped up with about 0.7ml. Hopefully I'll start feeling more.