Thought I'd brielfy update this thread.
Please note these key findings of the initial study.
QUOTE
patients. In
1995, CBD was tested in a case study with a
19-year-old schizophrenic female patient
who presented serious side effects after treatment
with conventional antipsychotics (47).
Following a wash-out period of 4 days this
patient received increasing oral doses of CBD
dissolved in oil, reaching 1500 mg/day, for 4
weeks. After this period, CBD administration
was interrupted and placebo was administered
for 4 days. Finally, the treatment was
shifted to increasing doses of haloperidol
that reached 12.5 mg/day. The psychiatric
interviews were video-recorded and the
symptoms were assessed by a blinded-psychiatrist
using the Brief Psychiatric Rating
Scale (BPRS). A significant improvement
was observed during CBD treatment,
If you were to try and extract 1500mg of CBD from hemp oil I have discovered the cost would be astronomical. However do any of those of you who use cannabis that has a high CBD content know approximately how much CBD you are consuming? Because you're clearly experiencing the anti-psychotic anxiolytic effect of the CBD.
This table shows the typical chemical composition of hemp oil

As you can see, there is 10mg of CBD in each kg of hemp oil.
You can buy hemp oil for about £10 for five litres from fishing shops . However you can even import it by the gallon..... 10mg/kg is way too low though if you need 1500mg to treat schizophrenia, however the dose required may be lower for other conditions.
Even if you obtained this hemp oil cheaply and in bulk, you've still got to perform chromatography to extract the CBD. Which I imagine is a costly and difficult experience. I'm also not sure on the legality of extracting the CBD. I mean, it's a metabolite, thus you can turn it into THC using some chemicals....... Not that this is what I'm suggesting.
Thus, it's extremely infeasible to use CBD from hemp oil to treat medical conditions.
The only other option I can see is trying to get hold of actual industrial hemp. Which should have quantities of CBD similar to that in Marijuana. I can't see anywhere selling industrial hemp in its raw form on the net, and as for extracting the CBD from raw industrial hemp.

. I guess you could smoke or vapourize it....
I must say this raise the question of what the penality would be were an individual to grow industrial hemp? I guess you could just say you accidently threw some bird seed into the garden? If you were prosecuted you could also point them to that incident the press reported where a little girl had planted a cannabis seed from bird seed etc and the authorities chose not to prosecute the parents......