Hopefully you're already aware that Ket can cause bladder damage, there are a number of studies out there worth looking up, I'm going from memory here, but IIRC the conclusion was that using ket 9 times a month is linked to a much higher risk of bladder damage. Not sure at what amounts but 1g is quite a lot of ket to be getting through in 1 day let alone 11g in a week...