I thought since there has been a lot of discussion about this recently that this link was worth posting about:
theguardian.com/lifeandstyl...
I think it is a fair representation of the current situation - no-one knows what the medical effect is going to be until they have done proper controlled trials and established effective doses - and that is probably about to start.
The doses used that are known to work in a medical problem are IRO 500-1000mg to achieve an effect. Commercial products speak about 2mg per bottle or "A daily dose of two hemp capsules made by Nature’s Plus offers 15mg of mixed “plant cannabinoids” without a specific CBD count." There is something of a difference!
I'm not saying it doesn't work - far from it, I would love to see trials of it as a steroid sparer. What I'm saying is that if you haven't got a fair bit of money to play with - don't worry, I don't think you are missing a lot yet.